You can't attain the speed of light. Since you've already postulated that impossibility in your question, go ahead and postulate whatever consequences appeal to you. We won't mind.
There is many thoughts about time travel one theory is that if you travel faster than the speed of light you can see into the future and sort of 'jump' into the future and then travel one again faster than the speed of light to see into the past and then 'jump' back of course this is just a theory and has not been proven or said to be true and who knows the future seeing might take you to the wrong time so if your traveling back into the past you might go TOO far back to the past, no-one knows if this is true it has been tried but has been failed to go faster than the speed of light
0.5 light speed
If you observe a clock moving past you at the speed of light, it will appear to you to have stopped.
You can't.
Yes. If I saw you move past me at the speed of light, and at the same time, you were measuring the speed of light with instruments that you were carrying, you would measure the same speed of light that everybody always does, regardless of whatever speed you were zooming past me. And as you passed by a star or a street light, you would cast just as good a shadow as you ever did. Physics 101, Introduction to Relativity. Wierd stuff.
The speed of light is always the same, as long as the light stays in vacuum or in the material substance it's in. The speed of the source generating the light, or the speed of the person who's measuring the light, has no effect on the light's speed. It will always measure the same number. That means: -- If a rocket is in space, flying toward you at half the speed of light, and the astronaut aboard shines a flashlight at you, and -- If you strap a jet-pack on your back and fly toward the rocket at half the speed of light, and -- If you measure the speed of the light from his flashlight as it shines past you, -- You'll measure the same speed of light as if you and the astronaut were both standing still. It can't be . . . But it is. It's been confirmed in thousands of experiments during the past 100 years.
Easy....travel faster than the speed of light...
The question is a logical mish-mash. Who said you need to use the entire universe to measure the speed of anything ? Simply define your own start and end points, and then measure the time light takes to travel between them. The points can be as mundane as two opposite walls of the restroom in your laboratory.
There is a past, present, and future. There was a past; there is a present and there will be a future.
Past - was Present - is Future - will be
True, since the speed of light is finite.
are and was