en-US Physics Forums RSS Feed This is the official global feed for PhysicsForums.com Sat, 14 Nov 2026 23:55:58 +0000 Sat, 14 Nov 2026 23:55:58 +0000 Physics Forums - Science by Humans https://www.physicsforums.com/ Better Definition of Euclidean Geometry For Use In Relativity Sat, 14 Nov 2026 23:51:04 +0000 https://www.physicsforums.com/threads/better-definition-of-euclidean-geometry-for-use-in-relativity.1086699/ urn:xenforo:thread:1086699 invalid@example.com (bhobba) bhobba Do people think the following may be a better definition of Euclidean geometry when discussing relativity than Euclids axioms:
https://philarchive.org/archive/ULIAES

Thanks
Bill]]> 15 Things that are getting tiresome to see in scifi (whichever medium) Sat, 14 Nov 2026 23:49:03 +0000 https://www.physicsforums.com/threads/things-that-are-getting-tiresome-to-see-in-scifi-whichever-medium.1086479/ urn:xenforo:thread:1086479 invalid@example.com (sbrothy) sbrothy "Something located in the constellation X."

You people have any pet peeves in this genre?]]> 72 Physics: Which courses were your favorites? Sat, 14 Nov 2026 23:27:57 +0000 https://www.physicsforums.com/threads/physics-which-courses-were-your-favorites.1086698/ urn:xenforo:thread:1086698 invalid@example.com (ichigosanchez04) ichigosanchez04 Hi everyone! I'm planning to restart/continue my Physics degree soon (here in Germany), and I'd love to hear some honest experiences from those who have already gone through it.

For context, I actually completed my first year of studying physics back in Ukraine (2022–2023, yes during full-scale...

Read more]]> 2 Space Stuff and Launch Info Sat, 14 Nov 2026 23:04:35 +0000 https://www.physicsforums.com/threads/space-stuff-and-launch-info.879196/ urn:xenforo:thread:879196 invalid@example.com (1oldman2) 1oldman2 Due to the constant never ending supply of "cool stuff" happening in Aerospace these days I'm creating this thread to consolidate posts every time something new comes along. Please feel free to add random information if its relevant. So to start things off here is the SpaceX Dragon launch coming...

Read more]]> 1740 Einstein equations don't work at large scale? Sat, 14 Nov 2026 22:27:47 +0000 https://www.physicsforums.com/threads/einstein-equations-dont-work-at-large-scale.1086101/ urn:xenforo:thread:1086101 invalid@example.com (gen x) gen x Below short video explain that Einstein equations don't work at large scale and dark matter/energy are just "fix" to make equations try to work. I also know that Einstein theory dont fit in quantum world.

I am interested what are the consequences that theory not works in large and micro scale...

Read more]]> 151 SpaceX starts operational Starship launches Sat, 14 Nov 2026 21:21:34 +0000 https://www.physicsforums.com/threads/spacex-starts-operational-starship-launches.1086220/ urn:xenforo:thread:1086220 invalid@example.com (mfb) mfb Based on air traffic coordination
Edit: Also as FAA advisory now

SpaceX should release a flight plan soon but we can expect a ~250-350 km circular orbit with a booster splashdown near the launch site. It will then deploy Starlink v3 satellites which were made specifically for...

Read more]]> 25 Was Richard Feynman's explanation of the twin paradox wrong? Sat, 14 Nov 2026 20:40:32 +0000 https://www.physicsforums.com/threads/was-richard-feynmans-explanation-of-the-twin-paradox-wrong.1086141/ urn:xenforo:thread:1086141 invalid@example.com (gen x) gen x Here Tim Maudlin explain that acceleration is not reason why one twin become younger, and that Feynman explained that wrongly?
Is this correct and can you explain what he want to say?


]]> 58 A question about telemetry receivers: Programmable Bit Synchronizer Sat, 14 Nov 2026 20:26:20 +0000 https://www.physicsforums.com/threads/a-question-about-telemetry-receivers-programmable-bit-synchronizer.1086689/ urn:xenforo:thread:1086689 invalid@example.com (senmeis) senmeis Hi,

This receiver, https://semco.com/wp-content/uploads/R300_Series.pdf, shall be used to receive telemetry data from launch vehicles. As far as I understand it analyzes and processes RF telemetry signals and outputs telemetry data over Ethernet (TM-over-IP). I just can’t understand what...

Read more]]> 6 Crash sinks a riverboat in New Orleans Sat, 14 Nov 2026 20:10:55 +0000 https://www.physicsforums.com/threads/crash-sinks-a-riverboat-in-new-orleans.1086700/ urn:xenforo:thread:1086700 invalid@example.com (BillTre) BillTre A asphalt hauler lost power and pretty much T-boned a riverboat in New Orleans, sinking it.
Apparently with no loss of life.

]]> 5 Collection of Lame Jokes Sat, 14 Nov 2026 17:44:15 +0000 https://www.physicsforums.com/threads/collection-of-lame-jokes.25301/ urn:xenforo:thread:25301 invalid@example.com (quddusaliquddus) quddusaliquddus Lamest joke you know ... :zzz:]]> 24404 Are Newton’s laws of motion an arbitary choice? Sat, 14 Nov 2026 17:40:24 +0000 https://www.physicsforums.com/threads/are-newtons-laws-of-motion-an-arbitary-choice.1086708/ urn:xenforo:thread:1086708 invalid@example.com (Sushmit Nandy) Sushmit Nandy Are Newton’s laws an arbitary choice among many, which holds good in certain frames which we call "Inertial frames of reference". In that way, one can construct any set of laws for any set of frames. Are laws of motion just dependent on what coordinates we choose. Do we not have frame...

Read more]]> 5 Is AI Overhyped? Sat, 14 Nov 2026 17:32:37 +0000 https://www.physicsforums.com/threads/is-ai-overhyped.1080669/ urn:xenforo:thread:1080669 invalid@example.com (SamRoss) SamRoss In my discussions elsewhere, I've noticed a lot of disagreement regarding AI. A question that comes up is, "Is AI hype?" Unfortunately, when this question is asked, the one asking, as far as I can tell, may mean one of three things which can lead to lots of confusion. I'll list them out now for...

Read more]]> 505 Do SR and LET differ in a toy model? Rotating composite rotor Sat, 14 Nov 2026 16:57:57 +0000 https://www.physicsforums.com/threads/do-sr-and-let-differ-in-a-toy-model-rotating-composite-rotor.1086706/ urn:xenforo:thread:1086706 invalid@example.com (AlexOsipovich) AlexOsipovich (This is not an attempt to promote or resuscitate the ether.)
I am working through a conceptual exercise about the historical Lorentz ether theory (LET), and I would like to check my understanding of its internal logic. I am not proposing a new theory. I am trying to see whether a literal...

Read more]]> 15 Random Photos Sat, 14 Nov 2026 16:23:31 +0000 https://www.physicsforums.com/threads/random-photos.994801/ urn:xenforo:thread:994801 invalid@example.com (Point Conception) Point Conception A topic for random photos: Ko-Larn island 7 km West of PattayaIMG_20200717_114141.jpg]]> 4012 Wordle Lovers - Play the NYT Daily Game Sat, 14 Nov 2026 15:58:49 +0000 https://www.physicsforums.com/threads/wordle-lovers-play-the-nyt-daily-game.1016903/ urn:xenforo:thread:1016903 invalid@example.com (fresh_42) fresh_42 This thread is for all who like the daily Wordle game of the New York Times as much as I do.

The rules:

1) https://www.nytimes.com/games/wordle/index.html
2) Post your result.
3) Do not spoil the answer.]]> 8867 Interesting math problem that I saw online Sat, 14 Nov 2026 14:52:00 +0000 https://www.physicsforums.com/threads/interesting-math-problem-that-i-saw-online.1086394/ urn:xenforo:thread:1086394 invalid@example.com (Charles Link) Charles Link Problem is contained in the summary above.]]> 65 Favorite jazz musicians and songs Sat, 14 Nov 2026 12:41:21 +0000 https://www.physicsforums.com/threads/favorite-jazz-musicians-and-songs.1051251/ urn:xenforo:thread:1051251 invalid@example.com (BadgerBadger92) BadgerBadger92 I have always liked Jazz music (and blues, electric blues to be particular)

Who is your favorite musician and song?

I’ve always liked Herbie Hancock, especially his song “Maiden Voyage.”

]]> 397 Cover songs versus the original track, which ones are better? Sat, 14 Nov 2026 11:56:09 +0000 https://www.physicsforums.com/threads/cover-songs-versus-the-original-track-which-ones-are-better.1050205/ urn:xenforo:thread:1050205 invalid@example.com (pinball1970) pinball1970 Which songs were performed, arranged or produced better in a cover than the original version?
Which songs should have been left well alone?

Also, I think restricting the covers just to released singles will restrict some interesting stonkers and stinkers so album tracks are allowed.]]> 2674 Proper way to export s2p for 100ohm differential line simulation Sat, 14 Nov 2026 10:05:16 +0000 https://www.physicsforums.com/threads/proper-way-to-export-s2p-for-100ohm-differential-line-simulation.1086707/ urn:xenforo:thread:1086707 invalid@example.com (yefj) yefj Hello,I have built a structure as you can see the differential excitation is creating characterictic impedance of 100 and 120 ohms on both ports.

The dillema starts when I exports the S2P file.
What reference impedance to use on export ?
When I export at 50 ohm and then present tdr with...

Read more]]> 0 Race car suspension Class Sat, 14 Nov 2026 09:07:52 +0000 https://www.physicsforums.com/threads/race-car-suspension-class.326355/ urn:xenforo:thread:326355 invalid@example.com (Ranger Mike) Ranger Mike Posted 1 November 2026- I proof checked the Index and should be better now. I intend to keep working on this for you Racers. Been 17 Years! later... rm

Posted June 2024 - 15 years after starting this class. I have learned a whole lot. To get to the short course on making your stock car, late...

Read more]]> 1813 Our Beautiful Universe - Photos and Videos Sat, 14 Nov 2026 08:10:01 +0000 https://www.physicsforums.com/threads/our-beautiful-universe-photos-and-videos.800540/ urn:xenforo:thread:800540 invalid@example.com (DennisN) DennisN This thread is dedicated to the beauty and awesomeness of our Universe. If you feel like it, please share video clips and photos (or nice animations) of space and objects in space in this thread. Your posts, clips and photos may by all means include scientific information; that does not make it...

Read more]]> 2468 YouTube Classics, Part Deux Sat, 14 Nov 2026 05:44:39 +0000 https://www.physicsforums.com/threads/youtube-classics-part-deux.826985/ urn:xenforo:thread:826985 invalid@example.com (lisab) lisab A continuation of YouTube Classics.

Playing trombone to 'wildlife':

]]> 834 The Devil has knocked on my door again Sat, 14 Nov 2026 04:42:59 +0000 https://www.physicsforums.com/threads/the-devil-has-knocked-on-my-door-again.1086696/ urn:xenforo:thread:1086696 invalid@example.com (DaveC426913) DaveC426913 Backstory:
I'm planning to put my book on display at a club arts and crafts show, and thought I'd make a poster of my book cover for visibility.
My concern is that blowing up the artwork back to original size will highlight all the warts and blemishes, which doesn't look very professional.

So I...

Read more]]> 9 Logic Puzzle: The Locker Puzzle Sat, 14 Nov 2026 04:12:46 +0000 https://www.physicsforums.com/threads/logic-puzzle-the-locker-puzzle.1086400/ urn:xenforo:thread:1086400 invalid@example.com (Matterwave) Matterwave Disclaimer: This is not the first time this topic was discussed here on PF. From my search, it was discussed lightly in 2022. Further, a solution to this puzzle was covered by the Youtuber Veritasium and various other youtubers.

I still feel like the puzzle is a very fun one! So I thought...

Read more]]> 14 Does cosmological time define an observer-independent global instant? Sat, 14 Nov 2026 00:57:23 +0000 https://www.physicsforums.com/threads/does-cosmological-time-define-an-observer-independent-global-instant.1086691/ urn:xenforo:thread:1086691 invalid@example.com (OmniThoughts) OmniThoughts I've often seen it said that, due to Relativity of Simultaneity, relativity makes a global instant impossible. τ at an event is the supremum of proper time along past-directed causal curves from it (Andersson, Galloway and Howard 1998, Class. Quantum Grav. 15, 309). A global instant is a surface...

Read more]]> 39 Probability of blue eyes in Canada's PMs Sat, 14 Nov 2026 00:26:09 +0000 https://www.physicsforums.com/threads/probability-of-blue-eyes-in-canadas-pms.1086663/ urn:xenforo:thread:1086663 invalid@example.com (DaveC426913) DaveC426913 Mark Carney (2025-): Blue
Justin Trudeau (2015-2025): Blue
Steven Harper (2006-2015): Blue
Paul Martin: (2003-2006): Blue
Jean Chretien (1993-2003): Blue
Kim Campbell (1993): Blue
Brian Mulroney (1984-1993): Blue
John Turner (1984): Blue
Joe Clarke (1979-1980): Blue
Pierre Trudeau: (1968-1984)...

Read more]]> 59 Share Animal Pictures: For Animal Lovers Fri, 13 Nov 2026 23:16:03 +0000 https://www.physicsforums.com/threads/share-animal-pictures-for-animal-lovers.583729/ urn:xenforo:thread:583729 invalid@example.com (micromass) micromass Post your favorite animal pictures here!]]> 3097 ZWO Seestar S50 PRO Fri, 13 Nov 2026 20:51:15 +0000 https://www.physicsforums.com/threads/zwo-seestar-s50-pro.1086135/ urn:xenforo:thread:1086135 invalid@example.com (davenn) davenn hi guys
ZWO have just announced and will be available mid-Sept. their new ZWO Seestar S50 PRO smart telescope.
This for astrophotography ( there is NO eyepiece to look through) 50mm objective and a 260mm focal length.
The scope connects to and is controlled by an app on your smart phone --...

Read more]]> 24 How to measure change in energy of a point particle in GTR? Fri, 13 Nov 2026 17:33:10 +0000 https://www.physicsforums.com/threads/how-to-measure-change-in-energy-of-a-point-particle-in-gtr.1086693/ urn:xenforo:thread:1086693 invalid@example.com (Lotto) Lotto If we track a geodesic of a particle with four-momentum ##p^{\mu}## and have at every point observers with constant space coordinates, meaning they may differ only in ##u^{0}##, can we correctly compare their measured energies? A would like to, for example, compare change in energy of my...

Read more]]> 7 Exoplanet, HD 137010 b and it's star, HD 137010 Fri, 13 Nov 2026 16:11:57 +0000 https://www.physicsforums.com/threads/exoplanet-hd-137010-b-and-its-star-hd-137010.1084179/ urn:xenforo:thread:1084179 invalid@example.com (Astronuc) Astronuc An article appeared recently about an earth-like planet, HD 137010 b, which is around an orange start, HD 137010. Of course, I wanted more information

HD 137010 b is an unconfirmed exoplanet detected around star HD 137010. More observations are needed to confirm its existence...

Read more]]> 16 Advice for Physics demo lessons (Grades 9/10 and IB DP Grade 11) Fri, 13 Nov 2026 12:31:32 +0000 https://www.physicsforums.com/threads/advice-for-physics-demo-lessons-grades-9-10-and-ib-dp-grade-11.1086671/ urn:xenforo:thread:1086671 invalid@example.com (dakshumutu) dakshumutu Hi everyone,

I am new to PF. Thank you for allowing me to connect with this forum.

I recently interviewed for a high school Physics teaching position at an international school in Europe and have been invited to the next stage, which involves teaching two sample lessons: one for Grade 9 or 10...

Read more]]> 3 A geometric puzzle: Area enclosed by three circular arcs Fri, 13 Nov 2026 11:56:17 +0000 https://www.physicsforums.com/threads/a-geometric-puzzle-area-enclosed-by-three-circular-arcs.1086585/ urn:xenforo:thread:1086585 invalid@example.com (bob012345) bob012345 This figure is bounded by three circular arcs of equal radius R. The arcs are tangent where they meet. Find the enclosed area in terms of R.

IMG_6749.webp]]> 7 How can every physicist become a Bohmian Fri, 13 Nov 2026 04:27:24 +0000 https://www.physicsforums.com/threads/how-can-every-physicist-become-a-bohmian.1086690/ urn:xenforo:thread:1086690 invalid@example.com (Demystifier) Demystifier I have just wrote a new, relatively long, insight article. Comments are welcome. :smile:

https://www.physicsforums.com/insights/how-can-every-physicist-become-a-bohmian/]]> 3 Published electroweak coincidences Fri, 13 Nov 2026 01:08:37 +0000 https://www.physicsforums.com/threads/published-electroweak-coincidences.1085257/ urn:xenforo:thread:1085257 invalid@example.com (arivero) arivero I have been told of a new preprint of Emilio Torrente-Lujan that revisits his publication Eur. Phys. J. C 74 (2014) 2744, arXiv:1209.0474 of coincidences in the electroweak scale. If I recall correctly we revised in the forum a lot of them, at the time of preprints, but I have...

Read more]]> 10 Prof. Verschure's thin section collection from the Fen and Hor localities Thu, 12 Nov 2026 23:32:57 +0000 https://www.physicsforums.com/threads/prof-verschures-thin-section-collection-from-the-fen-and-hor-localities.1054432/ urn:xenforo:thread:1054432 invalid@example.com (Andy Resnick) Andy Resnick (Edit: since the thread title was changed, this first sentence is too cryptic: the original title referred to a Tool song....)

Besides being a favorite song by a favorite band, the thread title is a straightforward play on words. This summer, as a present to myself for being promoted, I...

Read more]]> 185 How did meiosis and mitosis evolve in the course of evolution? Thu, 12 Nov 2026 23:06:00 +0000 https://www.physicsforums.com/threads/how-did-meiosis-and-mitosis-evolve-in-the-course-of-evolution.1086688/ urn:xenforo:thread:1086688 invalid@example.com (Tiny_Explorer) Tiny_Explorer How did the process of cell division evolved over time ?]]> 3 Latest Notable AI accomplishments Thu, 12 Nov 2026 22:32:37 +0000 https://www.physicsforums.com/threads/latest-notable-ai-accomplishments.937195/ urn:xenforo:thread:937195 invalid@example.com (gleem) gleem Developments in AI and machine learning continue to progress at a rate that may be surprising and not just in playing games but in pattern recognition and image analysis in medicine, astronomy and business. One of the challenges to AI is effective natural language processing. Last week both...

Read more]]> 155 Famous people known for two totally unrelated accomplishments Thu, 12 Nov 2026 21:11:15 +0000 https://www.physicsforums.com/threads/famous-people-known-for-two-totally-unrelated-accomplishments.1085786/ urn:xenforo:thread:1085786 invalid@example.com (sevensages) sevensages I always find it mighty interesting (and impressive) when people are famous for two or more totally unrelated things, especially when one didn't lead to another.

Here are some examples of people who are famous for two or more totally unrelated things:

Robert Leonard ---- He was an original...

Read more]]> 83 Best visualization of SO(3) Thu, 12 Nov 2026 19:40:55 +0000 https://www.physicsforums.com/threads/best-visualization-of-so-3.1086092/ urn:xenforo:thread:1086092 invalid@example.com (Matterwave) Matterwave I know a decent number of properties of SO(3) and obviously I can visualize the group action on three space as rotations. But a good visualization of the group itself eludes me.

SU(2) is somehow more intuitive to visualize since it simply is ##S^3##. So I just think of a 2-d sphere and say...

Read more]]> 39 What are some good books for learning Galois Theory? Thu, 12 Nov 2026 17:25:07 +0000 https://www.physicsforums.com/threads/what-are-some-good-books-for-learning-galois-theory.1082545/ urn:xenforo:thread:1082545 invalid@example.com (Math100) Math100 May anyone/someone please suggest/recommend some books on learning Galois Theory? Before learning this pure mathematics subject, is the knowledge of group theory required in order to study Galois Theory? I have the e-textbook of Galois Theory by Ian Stewart, 4th edition but was wondering if...

Read more]]> 44 Epistemology regarding c Thu, 12 Nov 2026 16:51:21 +0000 https://www.physicsforums.com/threads/epistemology-regarding-c.1086684/ urn:xenforo:thread:1086684 invalid@example.com (tezk_4) tezk_4 How do we know that c is the speed limit if our instrument is based on that speed limit, if the "medium" on how we perceive information is only photon then how do we calculate other "medium", isn't it's like relative velocity equation but the c is not constant but variable of the "medium"...

Read more]]> 6 Missing the quotation feature? Thu, 12 Nov 2026 16:41:48 +0000 https://www.physicsforums.com/threads/missing-the-quotation-feature.1086679/ urn:xenforo:thread:1086679 invalid@example.com (renormalize) renormalize Why is "+Quote" unavailable for posts in closed threads?]]> 5 Connection and metric Thu, 12 Nov 2026 15:14:56 +0000 https://www.physicsforums.com/threads/connection-and-metric.1086651/ urn:xenforo:thread:1086651 invalid@example.com (wrobel) wrobel I saw the following question somewhere on the forum—I don't remember which thread exactly—and I think it even went unanswered.
Consider a manifold ##M## with local coordinates ##t=(t^1,\ldots,t^m)##, equipped with a symmetric connection ##\Gamma_{ij}^k(t)##. What sufficient conditions must be...

Read more]]> 3 What is the correlation between entropy and velocity distribution? Thu, 12 Nov 2026 14:28:51 +0000 https://www.physicsforums.com/threads/what-is-the-correlation-between-entropy-and-velocity-distribution.1086687/ urn:xenforo:thread:1086687 invalid@example.com (lschuh) lschuh Hello,
The Boltzmann velocity distribution may show the curves for a low (T1) and a high (T2) temperature. The T2 curve is broader and flatter. A flatter curve means: a broad range of speed/KE. This means more micro states, which means a higher entropy S. This explains the increase of S with...

Read more]]> 11 Why haven't we evolved to see bacteria or viruses? Thu, 12 Nov 2026 06:46:08 +0000 https://www.physicsforums.com/threads/why-havent-we-evolved-to-see-bacteria-or-viruses.1086664/ urn:xenforo:thread:1086664 invalid@example.com (Rodney182) Rodney182 Apologies if this is too basic of a question, but it's something I've wondered. We can potentially turn this thread into a discussion as to why or what theories there are, if any.

I understand that we have 'reactions' to bacteria (in the sense of when things are dirty, we want to stay away; I'm...

Read more]]> 28 Terrence Tao is coming out with a popular math book Thu, 12 Nov 2026 05:59:45 +0000 https://www.physicsforums.com/threads/terrence-tao-is-coming-out-with-a-popular-math-book.1086588/ urn:xenforo:thread:1086588 invalid@example.com (Frabjous) Frabjous Six Math Essentials
https://www.amazon.com/dp/0374621799?tag=pfamazon01-20

(Six Maths Essentials in GBR...

Read more]]> 8 Where are Voyager and Pioneer heading? Wed, 11 Nov 2026 23:14:12 +0000 https://www.physicsforums.com/threads/where-are-voyager-and-pioneer-heading.1086251/ urn:xenforo:thread:1086251 invalid@example.com (Cerenkov) Cerenkov Hello,

I've been looking at this paper... https://arxiv.org/pdf/1912.03503 Future Stellar Flybys of the Voyager and Pioneer Spacecraft ...to get a better handle on where these four probes are heading, at a basic level as an amateur astronomer. Its been very helpful.

I'm trying to...

Read more]]> 54 GR analysis of Cavendish experiment Wed, 11 Nov 2026 20:27:10 +0000 https://www.physicsforums.com/threads/gr-analysis-of-cavendish-experiment.1086682/ urn:xenforo:thread:1086682 invalid@example.com (Dale) Dale In GR the gravitational force is a fictitious force. Fictitious forces cannot actually be measured, only inferred from the motion with respect to the chosen reference frame.

So, what does the Cavendish experiment measure? To be clear, I know that it is the torsion in the string, but what GR...

Read more]]> 21 STEM Children Education Box Wed, 11 Nov 2026 08:54:28 +0000 https://www.physicsforums.com/threads/stem-children-education-box.1086658/ urn:xenforo:thread:1086658 invalid@example.com (sbrothy) sbrothy 3B7E7DC8-1B1A-493D-ACB7-2FC2470B5125.webp


21458ADE-7301-4118-947F-3C2F86AED15A.webp

This is a set of 101 [sic! :)] physics experiments for children and young adults. Unfortunately it’s only in Danish. Norwegian, Swedish and Finnish. But if anyone wants to turn their children onto a STEM path I’d be willing to send it free of charge.]]> 6 I guess PF changed its backend calls Tue, 10 Nov 2026 21:02:03 +0000 https://www.physicsforums.com/threads/i-guess-pf-changed-its-backend-calls.1086683/ urn:xenforo:thread:1086683 invalid@example.com (DaveC426913) DaveC426913 After 20 years, my bookmark to the new posts page no longer works... :H


1794340832956.webp]]> 3 How much force might an electron withstand? Tue, 10 Nov 2026 20:27:11 +0000 https://www.physicsforums.com/threads/how-much-force-might-an-electron-withstand.1086678/ urn:xenforo:thread:1086678 invalid@example.com (bkelly13) bkelly13 This is a thought experiment. It cannot be performed, but maybe the thoughts it produces might be useful.

Imagine we have some tweezers that can grab a single electron. Or quark, or lepton. Imagine we can apply as much force to that electron as we choose. How much force might that electron...

Read more]]> 15 "The problem is, is that he's someone who isn't a specialist" Tue, 10 Nov 2026 19:58:14 +0000 https://www.physicsforums.com/threads/the-problem-is-is-that-hes-someone-who-isnt-a-specialist.1086673/ urn:xenforo:thread:1086673 invalid@example.com (Swamp Thing) Swamp Thing The double "is" and the unnecessary "is someone who" are forms that seem to be popular these days, at least on social media videos. Have they evolved within the social media era, or have they been around for decades?]]> 6 Agentic-AI/LLM 'misbehavior' or 'going rogue' Tue, 10 Nov 2026 16:47:09 +0000 https://www.physicsforums.com/threads/agentic-ai-llm-misbehavior-or-going-rogue.1085282/ urn:xenforo:thread:1085282 invalid@example.com (Astronuc) Astronuc Large Language Models (LLMs) are passive, text-based engines that respond to prompts, whereas Agentic AI systems are autonomous and use LLMs as their "brains" to plan, make decisions, and execute multi-step tasks using external tools (derived from Google's AI Overview). Depending on the...

Read more]]> 48 What if there's something that makes up quarks? Tue, 10 Nov 2026 15:12:16 +0000 https://www.physicsforums.com/threads/what-if-theres-something-that-makes-up-quarks.1086668/ urn:xenforo:thread:1086668 invalid@example.com (tezk_4) tezk_4 Up quark has mass of 2.2 MeV and 2/3 charge, if we divide 2.2÷2 then we get 1.1 MeV. What if the 1 MeV is something thats responsible for positive charge and 0.1 MeV is something that confine the thing that's responsible for positive charge. If this were true then the reason the harder u push...

Read more]]> 7 Hello from an A-Level Physics Student Tue, 10 Nov 2026 13:37:25 +0000 https://www.physicsforums.com/threads/hello-from-an-a-level-physics-student.1086680/ urn:xenforo:thread:1086680 invalid@example.com (dulina) dulina Hi everyone!


I’m an A-Level physics student preparing for my exams and spending a lot of my free time exploring classical mechanics and fluid dynamics.


Recently, I’ve been working through a conceptual model using Total Internal Reflection (TIR) and bathymetric trench geometry to passively...

Read more]]> 1 Autocorrelation in GPS Tue, 10 Nov 2026 12:55:43 +0000 https://www.physicsforums.com/threads/autocorrelation-in-gps.1086670/ urn:xenforo:thread:1086670 invalid@example.com (senmeis) senmeis Hi,

In GPS there are CA code and M code. As far as I understand it takes only a few ms to synchronize with CA code but it takes very long (maybe days) to synchronize with M code even if you know the M code because you have to wait for the start of this M code sequence. Is it correct?]]> 3 Why VSEPR Theory is not completely theoretically proven? Tue, 10 Nov 2026 12:12:31 +0000 https://www.physicsforums.com/threads/why-vsepr-theory-is-not-completely-theoretically-proven.1086661/ urn:xenforo:thread:1086661 invalid@example.com (Tiny_Explorer) Tiny_Explorer Why fundamental level of VSEPR Theory is more far away from understanding ?]]> 4 Why did I struggle so much in high school? Tue, 10 Nov 2026 10:50:43 +0000 https://www.physicsforums.com/threads/why-did-i-struggle-so-much-in-high-school.1086616/ urn:xenforo:thread:1086616 invalid@example.com (randomranger900) randomranger900 In high school, I mostly got Bs and Cs despite studying hard. I went to every class, took notes, did all the homework, participated in every discussion, asked questions, went to tutoring, did a lot of problems in the textbook, and more. Despite all of that, I still always bombed exams and could...

Read more]]> 59 What determines heaviness of objects in Space? Tue, 10 Nov 2026 06:28:26 +0000 https://www.physicsforums.com/threads/what-determines-heaviness-of-objects-in-space.1066992/ urn:xenforo:thread:1066992 invalid@example.com (Observer2000) Observer2000 Why for gravity some things like planets, stars are heavy enough to have a gravity so they don't fall of the space?

When a small object can free fall in space, why a planet has a gravity, and they are considered heavy to what formula?]]> 9 Hopelessly Devoted To Max Born Tue, 10 Nov 2026 02:43:06 +0000 https://www.physicsforums.com/threads/hopelessly-devoted-to-max-born.1086677/ urn:xenforo:thread:1086677 invalid@example.com (Bob Walance) Bob Walance The Nobel Prize-winning physicist Max Born had a granddaughter named Olivia Newton-John.

https://en.wikipedia.org/wiki/Max_Born

So, the next time you hear Olivia singing her hit song 'Hopelessly Devoted To You', you'll know who she was singing about.

Max Born and Olivia Newton-John.webp]]> 2 Riemann curvature of a metric defined with a coordinate basis Tue, 10 Nov 2026 01:26:01 +0000 https://www.physicsforums.com/threads/riemann-curvature-of-a-metric-defined-with-a-coordinate-basis.1086642/ urn:xenforo:thread:1086642 invalid@example.com (Jianbing_Shao) Jianbing_Shao If given a non-trivial metric field ##g_{ab}##, then we believe that we can get a non-zero Riemann curvature ##{R^a}_{bcd}## from such a metric. now if we start from a basis field:
$$e_a = {e_a}^I \frac{\partial}{\partial x^I}$$
Here ##e_a## is not necessarily to be a coordinate basis, So the...

Read more]]> 47 Learjet60 (N722BD) Crash near Palm Beach, Florida, US on Nov 1, 2026 Mon, 09 Nov 2026 23:45:16 +0000 https://www.physicsforums.com/threads/learjet60-n722bd-crash-near-palm-beach-florida-us-on-nov-1-2026.1086634/ urn:xenforo:thread:1086634 invalid@example.com (Astronuc) Astronuc
The NTSB team will spend days collecting every piece of the plane they can find. Investigators said Tuesday that pieces of a key part of the tail called the elevator, which controls the plane’s pitch, were found more than a mile away from the main crater. That confirms the plane...

Read more]]> 38 Forces and Acceleration of a Spacecraft Mon, 09 Nov 2026 21:47:34 +0000 https://www.physicsforums.com/threads/forces-and-acceleration-of-a-spacecraft.1086675/ urn:xenforo:thread:1086675 invalid@example.com (olivia ivaldi) olivia ivaldi My attempt and thoughts
I know that the two engines exert the same force and that the spacecraft starts from rest.

First, I need to consider the resultant force when the two engines push in the same direction. Then, I need to calculate the resultant force when they are perpendicular.

I think I...

Read more]]> 20 RIP Sir Patrick Stewart on your journey to the stars Mon, 09 Nov 2026 17:05:47 +0000 https://www.physicsforums.com/threads/rip-sir-patrick-stewart-on-your-journey-to-the-stars.1086598/ urn:xenforo:thread:1086598 invalid@example.com (jedishrfu) jedishrfu https://deadline.com/2026/10/patrick-stewart-dead-1237208580/

Sir Patrick Stewart, the star of Star Trek: The Next Generation and Star Trek: Picard, the X-Men franchise and many other films, TV shows and stage plays, died October 28 dat his home in Los Angeles...

Read more]]> 10 There Ought To Be A Word For... Mon, 09 Nov 2026 15:19:40 +0000 https://www.physicsforums.com/threads/there-ought-to-be-a-word-for.1086669/ urn:xenforo:thread:1086669 invalid@example.com (Hornbein) Hornbein There ought to be a word for : extra efforts to protect something that result in damage or destruction of that something.
How about Latin. protegendumdamnum, protection damage. Dumdamnum for short.

Like hiding something in a special safe place then forgetting where that is.]]> 1 Worth it to get a master's degree after a bachelor's in physics? Mon, 09 Nov 2026 14:10:19 +0000 https://www.physicsforums.com/threads/worth-it-to-get-a-masters-degree-after-a-bachelors-in-physics.1086665/ urn:xenforo:thread:1086665 invalid@example.com (ggg1111) ggg1111 Looking for a bit of advice regarding career/further education prospects. I graduated in 2023 with a bachelor's degree in physics and environmental studies with a decentish GPA (3.5). In the time since, I have been teaching physics at the high school level. This was never my long-term plan...

Read more]]> 2 Careers in theoretical physics and cosmology: jobs, education, salaries Mon, 09 Nov 2026 14:07:05 +0000 https://www.physicsforums.com/threads/careers-in-theoretical-physics-and-cosmology-jobs-education-salaries.1057981/ urn:xenforo:thread:1057981 invalid@example.com (DanielcoderX) DanielcoderX TL;DR Summary: Aspiring physicist seeking insights on job prospects, education paths, and salaries in theoretical physics and cosmology. Share your experiences and advice for informed decision-making. Thanks!

Dear members of the forum,

I'm currently in Grade 11, seeking insights on...

Read more]]> 8 Barbra Hambly's ebon Darwath rock... Mon, 09 Nov 2026 13:20:51 +0000 https://www.physicsforums.com/threads/barbra-hamblys-ebon-darwath-rock.1086614/ urn:xenforo:thread:1086614 invalid@example.com (Nik_2213) Nik_2213 One of the persistently unsettling features of Barbra Hambly's epic 'Darwath' tales and their tangents is that ebon-black rock.

Slabs sealing 'Dark' nests.
Plazas around 'Dark' nests.
The Keeps...

My take on it was a synthetic Basalt, made by 'MAGIC' as, by Clarkian definition, 'Beyond their...

Read more]]> 1 Ironman Suit -- Is it possible? Mon, 09 Nov 2026 13:01:20 +0000 https://www.physicsforums.com/threads/ironman-suit-is-it-possible.1086653/ urn:xenforo:thread:1086653 invalid@example.com (ayoimMac13) ayoimMac13 TL;DR: Ironman

Can you build an ironman suit?
To what i have come so far no. But i could assemble metall sheets thogeter or so and put a fan at the feet and hands to sostain around 87 kilos
or so.
What do you think?
Wright back if you have ideas]]> 2 O-1A Visa for early-career researchers: when is it realistically doable? Mon, 09 Nov 2026 07:16:18 +0000 https://www.physicsforums.com/threads/o-1a-visa-for-early-career-researchers-when-is-it-realistically-doable.1086605/ urn:xenforo:thread:1086605 invalid@example.com (AlexGreene2026) AlexGreene2026 I am a postdoc in the physical sciences in the US, currently on a J-1 and expecting to need H-1B sponsorship in a year or two. Several senior people tell me an O-1A is often easier than EB-1A and does not require an employer sponsor. For those who went through this first-hand, I would be...

Read more]]> 6 Is Movement Actually Relative? Mon, 09 Nov 2026 02:24:14 +0000 https://www.physicsforums.com/threads/is-movement-actually-relative.1086667/ urn:xenforo:thread:1086667 invalid@example.com (gravity4themasses) gravity4themasses I have been struggling with this. We have been told that movement is completely relative, that no particle has a speed in its frame, only a relative speed to other particles. But consider the following.
Ceers-2112 is a galaxy about 11.2BLY away and dark energy is moving that object at .8C away...

Read more]]> 3 Why is Bell’s theorem still considered controversial? Mon, 09 Nov 2026 02:22:28 +0000 https://www.physicsforums.com/threads/why-is-bells-theorem-still-considered-controversial.1086607/ urn:xenforo:thread:1086607 invalid@example.com (danieltanfh95) danieltanfh95 Taken at face value, Bell’s theorem seems to say that entangled particles are one shared non-separable joint wavefunction, and measurements of entangled particles (A,B) at two different spacetime coordinates produce correlated outcomes because they’re reading one joint object via the Born rule...

Read more]]> 48 Great ebass playing Mon, 09 Nov 2026 01:44:09 +0000 https://www.physicsforums.com/threads/great-ebass-playing.1083045/ urn:xenforo:thread:1083045 invalid@example.com (Hornbein) Hornbein Noted ebass player Mina has just joined East of Eden. She always was heard playing slap style before. Her finger style play is the greatest say I. How can anyone be so nimble?



Note the rust. There is a lot of rust in Japan. I think they like the way it looks. I know I do.]]> 103 Black Hole Fragmentation Sun, 08 Nov 2026 21:47:10 +0000 https://www.physicsforums.com/threads/black-hole-fragmentation.1086666/ urn:xenforo:thread:1086666 invalid@example.com (javisot) javisot I would like to ask about the recent article https://arxiv.org/abs/2606.24642 "when black holes can wear pants". This article discusses the "fragmentation" of black holes. We know that two black holes can merge into one, accompanied by the emission of gravitational waves; the article...

Read more]]> 1 Gerard 't Hooft on the incompleteness of quantum mechanics Sun, 08 Nov 2026 21:40:42 +0000 https://www.physicsforums.com/threads/gerard-t-hooft-on-the-incompleteness-of-quantum-mechanics.1086537/ urn:xenforo:thread:1086537 invalid@example.com (gen x) gen x Why today so many world-class physicists(so no pseudo or charlatans physicists), even some Nobel price like genius Gerard 't Hooft talk about quantum physics as incomplete, wrong etc?
What do you think of Gerard opinion that every single particle follow some for human still unknown deterministic...

Read more]]> 122 What determines size of a cell? Sun, 08 Nov 2026 19:12:18 +0000 https://www.physicsforums.com/threads/what-determines-size-of-a-cell.1086662/ urn:xenforo:thread:1086662 invalid@example.com (Tiny_Explorer) Tiny_Explorer What factor determines size of cell ? From Ostrich egg to mycoplasma ? Is the genes ?]]> 3 Quick question about being inside a Black Hole Sun, 08 Nov 2026 16:46:04 +0000 https://www.physicsforums.com/threads/quick-question-about-being-inside-a-black-hole.1086657/ urn:xenforo:thread:1086657 invalid@example.com (max-greece) max-greece i am inside a Black Hole. I am travelling through time towards the end of time (as I have understood it). Does that mean, therefore, that it is not a case that I cannot escape from the event horizon it is that I cannot take a "step" towards it as that would be travelling backwards in time...

Read more]]> 14 Avoiding AI hallucinations in science problem solving Sun, 08 Nov 2026 13:37:54 +0000 https://www.physicsforums.com/threads/avoiding-ai-hallucinations-in-science-problem-solving.1086659/ urn:xenforo:thread:1086659 invalid@example.com (Tiny_Explorer) Tiny_Explorer How we can avoid hallucination by ai while finding answer to science questions ?]]> 2 Introducing myself - not a physicist or mathematician. Sun, 08 Nov 2026 13:10:58 +0000 https://www.physicsforums.com/threads/introducing-myself-not-a-physicist-or-mathematician.1086656/ urn:xenforo:thread:1086656 invalid@example.com (max-greece) max-greece I've been fascinated by Black Holes for decades. Trying to understand certain aspects at the moment where simple questions should tell me if I have the wrong end of the stick. If, by any remote chance I don't then further questions follow.]]> 8 A Rotating Lego Mobius Strip Sun, 08 Nov 2026 11:26:52 +0000 https://www.physicsforums.com/threads/a-rotating-lego-mobius-strip.1086660/ urn:xenforo:thread:1086660 invalid@example.com (Hornbein) Hornbein

What you always wanted to know about Lego but were afraid to ask.]]> 0 Proper Acceleration And Time Dilation Sun, 08 Nov 2026 07:13:47 +0000 https://www.physicsforums.com/threads/proper-acceleration-and-time-dilation.1086648/ urn:xenforo:thread:1086648 invalid@example.com (physics2222) physics2222 What causes the time dilation for two observers, one undergoing acceleration and one remaining stationary, in the twin paradox? Assuming both started at point A, one goes to point B and back again. And the clocks were roughly in agreement when they started at point A.
I understand that once an...

Read more]]> 6 Watching port impedance in the a field monitor values Sun, 08 Nov 2026 05:44:23 +0000 https://www.physicsforums.com/threads/watching-port-impedance-in-the-a-field-monitor-values.1086650/ urn:xenforo:thread:1086650 invalid@example.com (yefj) yefj Hello ,I have a basic dipole antenna with 70 ohm port.
I put time domain H-field and E-field monitors.
does dividing the real values E/H on a cutting plane will give me 70 ohms traveling as the time goes by?
if the 70 ohm takes 1ns to travel from excitation to the ends what does it mean...

Read more]]> 4 Question about neutrino mixing Sun, 08 Nov 2026 00:44:20 +0000 https://www.physicsforums.com/threads/question-about-neutrino-mixing.1086655/ urn:xenforo:thread:1086655 invalid@example.com (echaniot) echaniot Hello!
I went back to studying my neutrinos and tried to get greater insight into mass eigenstates. This led to a gedanken experiment I have been toying with for a while, and about which I would like your help. Here goes.
Imagine that you produce an *ideal* beam of monoenergetic muon neutrinos...

Read more]]> 0 Could a black hole interior contain an entire universe? Sat, 07 Nov 2026 23:23:17 +0000 https://www.physicsforums.com/threads/could-a-black-hole-interior-contain-an-entire-universe.1086579/ urn:xenforo:thread:1086579 invalid@example.com (krishnamurthy) krishnamurthy I would like to share a thought experiment that occurred to me while thinking about black holes and the geometry of spacetime. I am not a physicist, and I am not proposing a formal theory. I am curious whether this possibility has been explored in theoretical physics.

The thought...

Read more]]> 44 Hi im new here Sat, 07 Nov 2026 22:24:10 +0000 https://www.physicsforums.com/threads/hi-im-new-here.1086652/ urn:xenforo:thread:1086652 invalid@example.com (ayoimMac13) ayoimMac13 Hi
Im new here]]> 1 Johann Sebastian Bach and his legacy Sat, 07 Nov 2026 19:57:58 +0000 https://www.physicsforums.com/threads/johann-sebastian-bach-and-his-legacy.1050949/ urn:xenforo:thread:1050949 invalid@example.com (Freyja) Freyja I would think He needs no introduction in a forum like this one. Good ol' JSB is, in my opinion, the greatest Genius who ever graced this world (and all the others). I am talking about the Man who sired the most intellectually complex, technically demanding, emotionally overwhelming, spiritually...

Read more]]> 124 Playing with perturbed FLRW spacetime Sat, 07 Nov 2026 18:04:36 +0000 https://www.physicsforums.com/threads/playing-with-perturbed-flrw-spacetime.1086646/ urn:xenforo:thread:1086646 invalid@example.com (GR_fan) GR_fan I'm trying to understand what sort of perturbation turns a non-singular cosmological spacetime into a singular cosmological spacetime. In other words, given a cosmological spacetime without a Big Bang singularity, what sort of perturbation would introduce a Big Bang singularity? Most likely...

Read more]]> 13 Solar Activity and Space Weather Update thread Sat, 07 Nov 2026 15:05:04 +0000 https://www.physicsforums.com/threads/solar-activity-and-space-weather-update-thread.923468/ urn:xenforo:thread:923468 invalid@example.com (Stavros Kiri) Stavros Kiri I am picking this up as a continuation and extension of the idea laid out e.g. in @davenn 's thread
"The Sun today - 9 July 2017 - nice spot group"
https://www.physicsforums.com/threads/the-sun-today-9-july-2017-nice-spot-group.919696/

See also (for continuity purposes)...

Read more]]> 469 Hi friends! Sat, 07 Nov 2026 08:01:07 +0000 https://www.physicsforums.com/threads/hi-friends.1086645/ urn:xenforo:thread:1086645 invalid@example.com (GR_fan) GR_fan Hello fellow kids --

I'm a long term lurker, but I've never posted here. I want to start doing that.

I'm particularly interested in General Relativity and cosmology. I look forward to many fun conversations!]]> 2 Guessing a card from a card deck Sat, 07 Nov 2026 00:09:14 +0000 https://www.physicsforums.com/threads/guessing-a-card-from-a-card-deck.1086637/ urn:xenforo:thread:1086637 invalid@example.com (DaveC426913) DaveC426913 1793893793960.webp

As with the TL;DR, the comments from SocMed (so it's gotta be true) indicate that both lead to the same 1/26 odds (actually some arguments suggest asking the second question led to slightly better odds.)

I'm finding this hard to grok.

Question 1 reads to a 1/26 chance of guessing...

Read more]]> 18 QM explanation of electromagnetic waves Fri, 06 Nov 2026 21:16:16 +0000 https://www.physicsforums.com/threads/qm-explanation-of-electromagnetic-waves.1086601/ urn:xenforo:thread:1086601 invalid@example.com (J O Linton) J O Linton Just as General Relativity has superceeded Newtonian gravitation, so QED is claimed to have succeeded Maxwells laws of elecromagnetism. What then is the standard quantum mechanical explaition of the fact that a bunch of elecrons oscillating in a wire 100 miles away can make an electron in my TV...

Read more]]> 11 Dark Energy is a form of Gravity Fri, 06 Nov 2026 18:02:27 +0000 https://www.physicsforums.com/threads/dark-energy-is-a-form-of-gravity.1086643/ urn:xenforo:thread:1086643 invalid@example.com (conformal) conformal Hi All
My name is Martin. I am 70 years old and although I haven’t any formal education my curiosity about the universe I live within has been with me since I was a child]]> 2 Could the way that SpaceX tests Starship be why the Raptor is still unreliable? Fri, 06 Nov 2026 15:48:03 +0000 https://www.physicsforums.com/threads/could-the-way-that-spacex-tests-starship-be-why-the-raptor-is-still-unreliable.1086638/ urn:xenforo:thread:1086638 invalid@example.com (RobertGC) RobertGC Famously, SpaceX does static testing for the Superheavy on the actual launch stand and only for seconds long burns. In contrast NASA constructed a separate test stand and static tested the Saturn V first stage for the full length of an actual burn, i.e, several minutes long. SpaceX in developing...

Read more]]> 2 Do any Bell papers plot raw data for non-entangled controls? Fri, 06 Nov 2026 13:52:52 +0000 https://www.physicsforums.com/threads/do-any-bell-papers-plot-raw-data-for-non-entangled-controls.1086615/ urn:xenforo:thread:1086615 invalid@example.com (tbp_Wallbreaker) tbp_Wallbreaker I've been looking closely at the experimental setups for loophole-free CHSH tests, and there's a methodological detail that's bugging me regarding how baseline calibrations rule out hardware artifacts.

Mathematically, we know the local hidden variable bound is |S| ≤ 2. But from a purely...

Read more]]> 23 How and when to know if the eigenvalue of H is energy? Fri, 06 Nov 2026 09:29:13 +0000 https://www.physicsforums.com/threads/how-and-when-to-know-if-the-eigenvalue-of-h-is-energy.1086430/ urn:xenforo:thread:1086430 invalid@example.com (LightPhoton) LightPhoton Take a general Hamiltonian with λ's as it's eigenvalues.

How do we know a priori when λ is energy and when not? For classical analogues, we can say when classical H=E, E being energy then quantum λ=E. But we have quantum systems with no analogue in classical mechanics. In those cases as well we...

Read more]]> 7 Best AI for technical translation Thu, 05 Nov 2026 23:31:26 +0000 https://www.physicsforums.com/threads/best-ai-for-technical-translation.1086641/ urn:xenforo:thread:1086641 invalid@example.com (Frabjous) Frabjous What AI’s are you using for technical translation into English? Are there languages that the AI’s are particularly good or bad at?]]> 4 How do I start string theory research? Thu, 05 Nov 2026 14:58:36 +0000 https://www.physicsforums.com/threads/how-do-i-start-string-theory-research.1086621/ urn:xenforo:thread:1086621 invalid@example.com (walkinglunchmoney) walkinglunchmoney TL;DR: I want to study and research string theory but get stuck on the advanced concepts and need help getting started ("explain to me like I'm a golden retriever" type thing)

I have a good grasp on the concepts behind Einstein's relativity, quantum mechanics, and the basics of...

Read more]]> 13 Choosing a masters programme Thu, 05 Nov 2026 14:37:56 +0000 https://www.physicsforums.com/threads/choosing-a-masters-programme.1085939/ urn:xenforo:thread:1085939 invalid@example.com (mih1451) mih1451 Heya everyone!

I'm a student at the University of Groningen in my 3rd year of BSc physics. Right now I am looking at masters to which to apply for next year.

My priority lies in industry/getting a stable job quickly after the programme ends, as I do not want to deal with the uncertainties...

Read more]]> 2 Talent Worthy of Wider Recognition Thu, 05 Nov 2026 14:01:59 +0000 https://www.physicsforums.com/threads/talent-worthy-of-wider-recognition.1064653/ urn:xenforo:thread:1064653 invalid@example.com (Hornbein) Hornbein The double lead guitar technique was invented by George Harrison on Your Bird Can Sing but the style didn't catch on. Jimmy Page put it on the map in Ramble On, then the Allman Brothers made it their signature. I like double lead guitar because that unique soaring sound is something no other...

Read more]]> 156 Today I Learned Thu, 05 Nov 2026 08:45:57 +0000 https://www.physicsforums.com/threads/today-i-learned.783257/ urn:xenforo:thread:783257 invalid@example.com (Greg Bernhardt) Greg Bernhardt Every day we learn new things. Sometimes it's just a small fact or realization. No matter how trivial or random, let's start recording our daily lessons.

Please start off with "Today I learned". Keep commentary to a minimum and just LIKE posts. I'll start!

Today I learned that you clean...

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