Rephrased question! How about, if l travelled at twice the speed of light for 4 years?

Question

Assuming on the way, l invented a telescope that could also see at twice the speed of light, would l then be able to see myself 4 years ago?

I really need that key

Answer 1

Time dilation formulas do work at speeds in excess of the speed of light, all you have to do is toss in i, or the square root of -1 (an imgainary number). Of course, as soon as you do that all your answers become imaginary also.

However, I digress. I will not discuss the answer someone gave you concering how something proven mathamatically is easier to belive than a stick billions of miles long and you waving it, becuase that also is not germaine to your question.

You want to know if you can see yourselve in the past if you traveled 8 light years into space and had a fancy smancy telescope.

Lets disreguard time and distance dilation, and just say you got 8 light years away in 4 years with your telescope (low power tachyon teleportation if you chose). You would see they Earth and you from 4 years before you left, and if you hung around for 4 years, you could see yourself leave.

I hope this is what you wanted.

Answer 2

I'm sorry but you're not going to get an answer that will satisfy you because the question is basically gibberish. You can't accelerate past the speed of light - and you certainly cant exceed it. The idea of of a telescope that sees at twice the speed of light is even more ridiculous. Do you mean it pulls light in to the lens at twice light speed? Do you think you see things by sucking in light?

I dont think you need the key. I think you need to stay locked up wherever they're keeping you.

Answer 3

Then you would get there before you left before the light did. You could only see yourself 2 years ago. You would have to go 8 times the speed of light.
So what is this key for?

Answer 4

I am afraid to say you cannot travel faster than the speed of light (c). Accordings General Theory of Relativity, NOTHING CAN TRAVEL AT THE SPEED OF LIGHT EXCEPT LIGHT ITSELF.

As you approach c, certain changes occur:
Time is distorted
You, the traveller, become thinner as mass is reduced
Space around you curves
Your hat would blow off

In theory, when you reached c, you would have almost no mass whatsoever, and without mass, you cannot be.


Try this:
Lie on your back with the light off
Think hard on where is the key
concentrate

Mind-regressionists beleive that this method can help your brain recall all sorts of things! Its much better than wasting time trying achieve the impossible.

Answer 5

The thing is, that's a bit of a non-question, since you cannot, under any circumstances travel faster than the speed of light. Nothing can and, as far as we can possibly tell, nothing will ever be able to. It is the cosmos's ultimate speed limit.

(And Chris D is right, btw. The faster you go, the slower time does, from the perspective of an observer).

Answer 6

the speed of light has nothing to do with time traveling. i have proved that already.

1. you cannot travel faster than the speed of light, light is free moving electrons, atoms which we consist of are made of protons neutrons and electrons so for protons neutrons and electrons to travel faster than electrons alone doesnt happen as you can see why.

2. even traveling exactly at the speed of light doesnt make time travel, reason why: light travels at the speed of light, so that would mean light has the ability to time travel, so that would mean that light coming out of a star would go back in time to the time when it was still in the star and the star would nver lose any of its energy, but stars do lose energy and time travel is not possible.

but just to be funny, if time travel were possible do you think we would put our poop in a time machine to bring it back to the time before it was digested so it could be digested again??
well there's something to think about hehe. :)
best answer.

and if we were capable of traveling faster than the speed of light who wants to know what it would look like? we would look like ghosts. we would be invisible because we travel so fast that we move out of the way before light has a chance to hit us, but then again since we are moving so fast we are running into photons of light so we still remain partly visible.

hope this brings some new ideas to you from the person who knows more about time travel and the speed of light than anyone else. :) :) :)

Answer 7

Time dialation equations don't work over the speed of light, so that's kind of irrelevant.

If the heart of the question is could you see yourself if you travelled faster than light, let's imagine that you goout in your yard, look up at the sky and wave Hi!

Then you get into your super-duper-warp-jumper and jump four light years instantaneously, and then get out your super-duper-hyper telescope and look down at your yard. In four years the light of you waving "Hi" will get to your position and you will see yourself wave.

While you wait, you can catch up on four years of Seinfeld re-runs.

Note that all this is, with current technology and theoretical understanding of physics, completely impossible.

Answer 8

Why not travel the 8 lightyears by going through a wormhole, and then look back with a regular telescope? That would work, and doesn't obviously break the laws of physics. You would see yourself as you were in the past.

Answer 9

Traveling speed of light means nothing, you wouldnt be traveling in time no matter how fast you're traveling. To prove that think of yourself holding a stick in your hand that is billions and billions of kilometers long. Now when you move your arm over your head holding that stick, at the end of the stick it'll move pretty fast! maybe twice, maybe four, maybe 10 times faster than the light, depending on the length of the stick. Now think, do you really think that at the end of your stick, it will travel in time and catch up with you before you moved your arm? No; the stick will remain still as long as you dont move your arm.
Einstein's theories are just political based bullshit. I'm sorry to break it to you mate, but there's just no possible way to beat time. So whatever has happened 4 years ago, i advice you to get over it ;)
cheerz

Answer 10

1) you cant travel at twice the speed of light - its impossible
and
2) the telescope just sees something...it cant see at twice the speed of light- u would need to double the speed of light, which also cant be done

so, its impossible
and even if it was possible, you could only see yourself 2 years ago...but its impossible...dont even dream