is time travel possible ?

No.

 

I really like to travel and time travel is not possible. As for me, I used to travel a lot across different countries and used to book a next destination in Dubai. I decided rent a car at Evolve which is a perfect way to spend time there and to know a lot of interesting things.

 

Yes, just take up drinking, porn addiction, video games, or any other vice. Time will evaporate.

 

As far as I've understood when one travels faster than light speed, time slows down for them and thus it could be considered to be time travel to future. I don't remember the science behind it though.

Time travel to past would completely revamp our understanding of time and I don't believe it to be physically possible. Although I do believe in things that go beyond physics, I guess that's another topic entirely.

 

RELIGIOUS DISCUSSION NOW

 

The thing is that our Mathematical Models are facing problems when it comes to travelling at Luminal speeds. We’re having a hard time making 2 major theories in our Model agree with each other. We don’t have much opportunity for experimentation.
I was watching a lecture given by Leonard Susskind on youtube, titled ‘Inside Blackholes’, you guys should totally check it out.

 

Welp! How about no!

 

The way I understand time is that it is only a frame of reference. That would make it a unitless quantity in physics, such as optical density, for example. So then, you might say that the SI unit of time is the second, thereby enforcing the idea that it is one of the 7 fundamental units in nature. However, the fact remains that the scientific definition of 1 second is based on another base SI unit- distance.

This is an older definition of 1 second:
It is the time required for an electromagnetic field to propagate 299,792,458 meters (2.99792458 x 10 8 m) through a vacuum.

That said, a "second" is only a fundamental slice of time, similar to how a dozen eggs in a crate have 1 egg as their fundamental unit.

At least, that's how I see it.

That said, I believe that the past and the future do not exist. They are just memories and expectations, respectively.

Then again, it is said that Tesla did some experiments on teleportation and some were successful on small scales over short distances. The current view of science dictates that time and space are related entities ( the theory of Relativity, for example), so that said- I am open to being corrected.

This is why I hate physics lol. It's just guesses and numbers and seeing which delusion fits lofe the best.

 

No. Gravity affects time, which means time is very much a physical quantity, just because we human don’t have free will of changing our time coordinates dosen’t mean Time isn’t a dimension, or more fundamentally, a physical quantity.

Imagine you were some creature, dimensionless, And you were fixed at some coordinate in space(let’s keep time out of the picture for now), you can perceive and measure your surrounding space, but you can’t move. Now would you say that the surrounding space dosen’t exist because you can’t move?

 

You do know I said this right:

 

If i were dimensionless, how would the question of moving even come into play?

 

Why not? We do this all the time in physics. When you write F=ma say, for a car, you’re writing this for the Centre of Mass of the car, a point.

Just because you or me, humans can’t think of being a point(in Space coordinates)being, dosen’t mean the laws of Physics prevent that. And this is how theories proceed, by making some ground assumptions in an ideal situation.
Without these theories and assumptions, you wouldn’t be holding this device in your hands. Humans would have been nowhere today, had it not been for these assumptions and theories.

 

But I do Assert that these theories are not good enough as yet, to explain time and answer “THE QUESTION” of Time Travel

 

Of course it's possible. At the moment we are all (probably) travelling forward in time at the same speed.

Besides that, you can travel forward quicker than others by moving fast in space away and then back. It's a thing in special relativity called time dilation. It has been shown to be true in many experiments.

For example, a trip to the Alpha Centauri at 80% of the speed of light will take you 6 years. When you get back to Earth, everyone will have aged 10 years, which means you traveled 4 years into the future. (Taken from https://en.wikipedia.org/wiki/Twin_paradox)

 

it is possible if you have a machine/plane/rocket that can travel with speed more than twice the speed of light then its possible.

 

It's absolutely possible. Einstein himself defined time as a dimension of its own, the fourth dimension to be specific.

He also came up with this very intriguing idea called "time dilation", but it would require you to travel at a higher speed than light which as far as we currently understand (or at least that I'm aware of) is a physical impossibility.

There is one other possibility I'm aware of. Einstein discovered that space and time are relative to one another, hence the term spacetime. There's this crazy thing called gravity, which is the direct result of an object with mass bending space, and time. When an object has more mass, such as in the case of the Earth, time passes more slowly. Likewise, when an object has less mass, such as in the case of the moon, time passes more quickly. So, technically if you went to the moon you would be traveling into the future by a fraction of a second.

Therefore, it would make sense to conclude that it should theoretically be possible to use this effect to your advantage as a means of time travel. The extent of the effect would be determined by the amount of mass and energy you were able to harness.