Mindset Medieval

Time travel : time machine, wormholes, possibilities and theories

2020-07-15T20:49:00.000+05:30

Time travelling might sound like a fun trip, but some physicists think it may actually be possible. We 're really travelling in time! For starters, we fly a year in time between birthdays. Since several respondents have pointed out, we travel constantly though the time — just forward, and all at the same rate. Yet, really, flying in time is more than mere fiction. But first, we need to understand the time.

Understanding time

What is the time? Although most people believe of time as a constant, physicist Albert Einstein has shown that time is indeed an illusion; it is relative-depending on your speed through space, it can vary according to different observers. For Einstein, time is the "fourth dimension." Space is defined as a three-dimensional environment that provides a traveller with location-showing parameters — such as length, width, and height. Time offers one more parameter— direction — even if it only goes forward conventionally. (A new idea, conversely, contends that time is "real.")

Einstein's special relativity principle suggests time slows down or accelerates depending on how fast you travel in comparison to anything else. An individual inside a spacecraft will age significantly slower when reaching the speed of light unlike his twin at home. Equally, under that same general relativity theory of Einstein, gravity will manipulate time.

Picture a fabric called space-time in four-dimensions. When something that has mass rests on the piece of cloth it creates a space-time dimple or bending. The space-time bending causes bodies to travel along a curved course, and that space curvature is what we recognize as gravity. Both of the general and special relativity theories have also been proved with GPS space technology which has onboard very precise timepieces. Here's how Einstein's theory says gravity often bends space and time, slowing down the passage of time. The way high where the Earth's gravity is much lower than the satellite's orbit. That causes GPS satellite clocks to move faster than ground clocks. The cumulative effect is that the clocks encounter time on GPS satellites at a rate slightly quicker than 1 second every second. Luckily, arithmetic may be used by scientists to correct certain variations in time. "Is it possible to travel across time? We need to be a little more precise about what we imply by travelling through time, to address this issue.

What is time travel?

For decades, time travel — travelling between various points in time — has been a popular subject in sci-fi. Time travel is the idea of movement between different places or locations in time, analogous to movements by an entity or an individual across different points in space. H. G. Wells has popularized the idea of a time machine in the book 'The Time Machine', published in 1895.

Some ancient myths show a character jumping ahead in time. The Hindu mythology Mahabharata relates the story about King Raivata Kakudmi, who journeys to the heaven to meet 'Brahma' the creator and is shocked to find that so many years have passed when he returns to earth. The "Urashima Tarō" Japanese tale first mentioned in the Manyoshu tells about a young fisherman called Urashima-no-ko visiting an undersea castle. He returns to his village after three days and finds himself in the future for 300 years, where he's been lost, his house is in ashes and his family has disappeared. There are various stories related to time travel but no one really has any proof.

Physicists address in scientific papers the existence of closed time-like curves, which are world-lines that create closed loops in spacetime, causing objects to travel to their own history. Solutions to the general relativity equations are known to describe space-times that involve closed time-like paths, but the physical validity of these answers is unclear. Many within the research community agree that it is extremely difficult to move backwards in time.

After all this, the idea of time machine came into existence.

What is a time machine?

Time Machine or Time Travell machine is a hypothetical system that enables travel to, or to go beyond a certain point in time, the past and future. Unlike those frequently portrayed in science fiction films, the concept of constructing a time machine is possibly the subject of dreams. If somebody and somehow managed to make a time machine to go back in time or go into the future then he/she could watch history directly and erase any ambiguity about previous events. He/she was able to watch a potential future and see how decisions and events worked out, could retrieve and/or conceal lost treasures for future recovery. In the past, battles could be fought with the use of a time machine by killing rivals. For a well-placed bottle of poison in a town, whole countries and communities may be washed out. Any nihilist will finally wipe out the human race when we come out of the forest. Any past or future that a time traveller encounters will eventually become detached from the traveller. Whether the traveller himself would become an anomaly as his/her influence would pass upstream or branches would result in certain influences. Thinking forward will help policymakers and average citizens make the right choices.

This would be helpful to us to be able to fix past errors, both on your own and of other people. It is a wonderful dream to travel back in time to visit an earlier age. Isn't it cool!!!

So, What do you think time travel is really possible or not?

Is Time Travell possible?

Time travel might sound much-fetched although scientists are already investigating some nature mysteries that may result, one day we can see the fulfilment of this dream. For certain general relativity spacetime geometries which allow moving faster than the speed of light, such as cosmic strings, traversable wormholes and Alcubierre drives, time travel to the past is theoretically possible. No one has figured out how to construct a special vehicle going from now until yesterday. However, astrophysics provides us with one potential route: the power of a black hole could possibly be harnessed to travel through time and space. According to general relativity, a spinning black hole may create a wormhole- a hypothetical distorted space-time created by the Einstein field equations of general relativity i.e. a theoretical relation between two space-time sites, or maybe even two points in separate universes. There is a black hole issue though. For a long time, they were believed to be unreliable, and thus untraversable. Fortunately, recent advances in the theory of physics have shown that these constructs could actually provide a means of travelling through time.

Sadly, in doing so we have absolutely no idea what to expect. Quantum physics still attempts to predict what will happen within the wormhole, on the premise that one could even enter such a location. Further to the point, there is no simplest strategy in engineering that would allow us to construct a craft that can safely make that journey. The idea of travelling back in time raises all sorts of paradoxical questions and resulting in problems like the grandfather paradox. But let's talk about paradoxes and stuff in another blog...

To know more about black holes click here

Summary

Yeah, time travel is a real thing indeed. But it's still not exactly what you've been through in the movies. In such circumstances, the passing time can be measured at a pace other than 1 second/second. And there are significant reasons why we need to recognize the requirement of time travel in the real world.

Mindset Medieval

What are black holes ? definition | types | Dangerous?

2020-06-27T12:19:00.004+05:30

Black holes are some of the outer space's strangest and most fascinating objects. A black hole is a site in space where gravity pulls so much that even light can't escape. The gravity is so intense because it has compressed matter into a small vacuum. That can occur when a star dies. Since there can be no light coming out, humans can not see black holes. They are invisible to all. Space telescopes can help locate the black holes via special instruments. The special instruments will see how stars in close proximity to black holes behave differently from all other stars.

History

Albert Einstein first foretold the existence of black holes with his general theory of relativity in 1916. A German physicist and astronomer identified Karl Schwarzschild suggested the modern concept of a black hole in 1915 after discovering an accurate solution to Einstein's general relativity approximations. The first-ever observed black physical hole was found in 1971. Then, in 2019 the collaboration of the Event Horizon Telescope (EHT) released the first-ever recorded image of a black hole.

What do black holes look like?

We know from now on that black holes are mysterious areas where gravity is intense enough to bend light, warp space, and manipulate time. Scientists are unable to see black holes because they see stars and other objects in space. Alternatively, astronomers must focus on detecting black holes produced by the radiation as dust and gas are drawn into the massive creatures. But supermassive black holes, lying in the central core of a galaxy, may become enveloped by the thick dust and gas around them, which can block the telltale emissions. The interior region of a black hole, where the mass of the object lies, is known as its singularity, the one point in space-time where the mass of the black hole is concentrated.

How do black holes form?

Scientists think that when the universe started, the smallest black holes developed. Other than that it is widely agreed that stars with a mass at least three times greater than that of our Sun that experience extreme gravitational collapse until their fuel is exhausted. The combined force of gravity, with so much mass in a small space, overcomes the law that normally prevents the building blocks of atoms from occupying the same location. All this density produces a black hole. Stellar black holes are created when a very large star's core falls or collapses on itself. If this occurs it gives rise to a supernova. A supernova is an exploded explosion that throws a part of the explosion into space. Galactic black holes are created when a very large star's core falls or collapses on itself. If this occurs it gives rise to a supernova. A supernova is a star that explodes and blasts half of the star into space.

Types of Black Holes

Three types of black holes have so far been established by astronomers: stellar black holes, supermassive black holes and intermediate black holes.

1.Stellar black holes

A stellar, black hole (or black hole of stellar mass) is a black hole created by a star's gravitational collapse. We have solar masses varying from around five too many hundreds. The cycle is detected as an explosion in hypernova or as a blast of gamma rays. Those black holes are also called collapsars.

2.Supermassive black holes

A supermassive black hole (SMBH or sometimes SBH) is the largest type of black hole which contains a mass of hundreds and thousands to billions of times the mass of the Sun. Like binary black holes with mass, one does not encounter substantial tidal force until very far within the black hole. These black holes are believed to exist in the middle of nearly every galaxy, along with the Milky Way.

3.Intermediate black holes

An intermediate-mass black hole (IMBH) is a class of black hole with its mass varying in the range 102-105 of solar mass which is slightly greater than stellar black holes but less than the supermassive black holes with approximately 105-109 solar mass. All of these IMBHs that formed in the same area could ultimately collapse together in a galaxy's centre and generate a supermassive black hole.

Could a Black Hole Destroy Earth?

Black holes do not eat stars, moons and planets in space. The planet does not collapse through a black hole because there is no black hole near enough for Planet to do so to the solar system.

And if a black hole were ever to take the place of the sun by the same mass as the sun, Earth would still not fall in. The black hole would be equally gravitational as the sun. Earth and the other planets will orbit the black hole while now circling the sun.

The sun never gets turned into a black hole. The sun is not a star massive enough to create a black hole.

Mindset Medieval

Artificial Intelligence. Dangers of AI | Mindset Medieval

2020-06-20T13:39:00.005+05:30

What is AI?

AI or Artificial Intelligence is a wide-ranging branch of Computing involved with building sensible machines capable of the talks that generally need human intelligence. Looking at the core of AI, it is a branch of Computer Science that aims to replicate human intelligence in machines. Simply, AI is building machines that are intelligent

From SIRI and Google Assistant to Self-driving Cars, Artificial Intelligence is growing with a very fast pace. Some Examples of AI

Smart Assistant like Siri & Alexa
Drone Bots
Spam Filters on Email
Social Media Mopping tools for dangerous content
TV shows & Songs recommendations in Apps like Spotify, Netflix etc.

Why AI is dangerous?

According to the researchers, they somehow agree that super-intelligent AI can become dangerous for humans. They can do something devastating. Consider, Autonomous weapon that is programmed to kill with the help of artificial intelligence within the hands of a person with bad intentions, these weapons may simply cause mass causalities.

You probably have watched the popular movie series ‘Transformers’ what if, Robots designed for wars or for safety purposes with super-intelligence became uncontrollable for, they probably will tissue these powers.

Another big reason for calling AI as one of the most dangerous things is the IA war that also results in mass causalities.

Machine Learning(ML) Vs Artificial Intelligence(AI)

Machine learning (ML) and Artificial Intelligence (AI) are two very hot buzzwords, and often seen to be confused by each other. They are not quite same but sometimes it leads to confusion. As from the above article, we know that Artificial Intelligence is used in machines in contrast to the intelligence in humans. Machine learning is nothing but, a way of learning or achieving artificial Intelligence (AI). So, after this don’t get confused between Artificial Intelligence (AI) and Machine Learning (ML).

Let’s deep dive into subcategories of AI & ML to understand differences between them.

1. Artificial Intelligence

The main objective of AI is to make machines able to think like a human brain. Artificial Intelligence is further classified into two categories :

(a) Artificial General Intelligence

The AGI or Artificial General Intelligence is an emerging field aiming at the building of thinking machines. It refers to the field which makes machines capable of thinking like humans or perhaps beyond humane general intelligence. It intended to develop and demonstrate understanding and reasoning skills in machines.

(b) Artificial Applied Intelligence

Artificial Applied Intelligence (AAI) is generally defined for an application of AI to make a high-functioning system for a dedicated purpose that replicates human intelligence and sometimes surpasses it.

2. Machine Learning.

Talking about ML, it is a subfield of AI, where machines are so that they can work on themselves and learn new things by themselves to adapt to changes. Machine learning is also subdivided into two categories based on ML algorithms:

(a) Unsupervised Machine Learning

It is a self-learning technique in which a machine system need to discover the features of the input population and no training is required for it.

(b) Supervised Machine Learning

In this technique, learning is acquired by giving training and input and output patterns to the system.

Mindset Medieval

Protest against police in USA. Black Lives Matter Activist Movement.

2020-06-20T13:14:00.005+05:30

What Is Black Lives Matter Activist Movement?

An activist protest continues to spread following the death of George Floyd. broader movement and its connected organisations generally advocate against police violence towards black individuals, yet as for varied different policy changes through about to be associated with black liberation.

The movement began in 2013, with the use of #Blacklives Matter on Social media platforms especially on Twitter in the response to the acquittal of Trayvon Martin’s murderer, George Zimmerman.

Black lives matter is an ideological and political intervention in the world where Black lives are internationally targeted for demise. Public opinion on race and its justice-related problems has been steadily moving left since the primary protests started catching fire over the fatal shootings of Trayvon Martin and Michael Brown.

Since the death of George Floyd on 25th May, Public’s belief on race, criminal justice and the black lives Matter movement jumped leftward.

Support for Black lives matter movement has increased by about as much as it increased over the last two years, Over previous two weeks with the majority of USA citizens backing the protests, it is additionally attainable that steps by political leaders may move this opinion further. The support from Republican electoral officers may offer permission for a few doubtless sympathetic Republican voters to re-evaluate their views on the problem.

Leadership seems to be broken from the COVID-19 pandemic and police brutality to target the minor communities around the world. We as a human need to take a step forward in support of this and need not to support people taking advantage of the situation to engage in criminal behaviour.

I Can't Breathe!!! Protest...

Nations around the world have watched in concern over the civil unrest within the U.S. following the death of martyr Floyd, a Black man who died when a white cop (Police Officer) ironed his knee on his neck till he stopped breathing. George Floyd’s was dying words are “I can’t breathe…I can’t breathe”. After which the protest against the United State Police had started.

Not only in the United States, but thousands also gathered in Central London to offer support for demonstrators. They at the point walked to the U.S. embassy, where a long line of officers encompassed the building. A few hundred milled around in the street and waved postcards. Protesters in Denmark too gathered at U.S. embassy. They all carried placards with messages like “stop sloughing black people”. Also, the U.S. embassy in Berlin had become the place of protest in support of Black lives matter movement. It became the headline for top-selling world newspaper in Germany. In Canada, thousands gathered in Toronto’s Christ Pitts park, sometime recently they walked to police headquarters.

Black lives matters” is now a symbol of anti-racism for everyone. The United States, being the most powerful nation is still suffering from inequality and racism. What can we all do to contribute to this community is to not judge someone by his/her colour, sex or race.

Mindset Medieval

Respecting Elders? Is it necessary? Why or why not?

2020-06-14T12:17:00.003+05:30

What do you all think? Please tell your views on it...

My stance on the complete respecting your elders' issue is straightforward and is just about what most of us think. Respect is usually earned. The aged tend to urge it thanks to their time on this earth giving them a good deal of knowledge, however, there is a unit several exceptions to the current. I’ve seen teenagers wiser than seventy-year olds and 70+ year old be like youngsters.

For example, I worked at a company that uses a crane for cargo as a general labourer. I was going to be trained to operate the crane by one of the senior operators. So what does the guy do? he gets to paint and paints over all the labels in the crane all so it would be harder for me to learn. I heard him bragging about it and about how he’s been operating cranes for 40+ years and wasn’t about to let young blood screw him over. If he was so confident in his abilities then he would never be at risk of me “screwing him over”. Over my time at that company, I watched that very same “operator” make some of the stupidest mistakes and sometimes highly hazardous things in heavy equipment that include, lifting a load before the guys tying the load up is ready, resulting in them falling down, or even pinching a guy’s hand between the straps and the load on the crane and lifting him up a couple feet off the ground. I watched him flip the crane overdue to him not having the outriggers deployed and trying to lift something too heavy while the boom on the said crane was extended way too far. The company bought a crane off another company that was doing repair work. The operator from that contracted company knew how to handle a crane. that operator used that crane for 6–10 months with no problems. When the operator for the company I was working for got in it, on his second use, he broke the freaking chain that moved the darn thing, this was after the operator from the other company and that other company’s mechanic showed him how to use the crane. The whole ordeal was basically him telling them how everything in the crane was wrong. I can go on and on about this guy but yeah this is all I wanted to tell you and yes I can give you more examples like this.

I can get a bit long-winded with this subject because I’m from a country with a culture that really into the whole respect your elders' thing. Yet in my hometown, the vast majority of older people (and by extension even younger people) act like entitled, self-righteous, childish morons. You doing something that is clearly more efficient? no, they want you to do it their way when asked why you get an answer that amounts to “because I said so” or “because that is the way it’s always been done”. You working together to finish a task? 90% of the work gets dumped on you. You’re the same rank as the older guy but simply because he’s older he feels that he doesn’t need to work as much so I’m stuck lifting heavy boxes and lumber by myself. I bring this up with him and he tries to chew me out saying “he paved the way for guys like me.”

Long story short, the ones you call elders are supposed to be wise and mature and guide the younger generation NOT antagonize them. If they don’t have that wisdom and maturity, then they are not worth respecting beyond a proper greeting.

I’d conjointly wish to add that their knowledge is predicated on their experiences. Which was quite valuable back within the day, as very little as 25–50 years ago in truth. however the globe is dynamic, and it’s doing and growing at a very fast pace, therefore, area of their thinking and their wisdom, most in order that the worth of their knowledge that's primarily based off their personal experience is gone down.

Please, comment your views on it....

Mindset Medieval