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If someone traveled for one year at the speed of light, how many years would pass on earth in that time
[From: ] [author: ] [Date: 13-05-04] [Hit: ]
and exactly one year of time would have passed on Earth. (The time dilation effect only happens to the traveler, not to the Earthlings who remain on Earth.)-Einsteins idea about time slowing down sounds fine in theory, but how can you be sure hes right? One way would be to hop in a rocket and travel near the speed of light.......
Of course, a human is not a photon. But if a human were to travel at 99.99999% of the speed of light for exactly one year, you would have traveled 0.9999999 light years in distance, and exactly one year of time would have passed on Earth. (The time dilation effect only happens to the traveler, not to the Earthlings who remain on Earth.)
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Einstein's idea about time slowing down sounds fine in theory, but how can you be sure he's right? One way would be to hop in a rocket and travel near the speed of light. Yet everything we know about physics says we can't do that.
Why? Did you notice in the Time Traveler game that the rocket could travel very fast, but could never reach 100 percent the speed of light? Well, there's a good reason for this....
According to Einstein's special theory of relativity, objects gain mass as they accelerate to greater and greater speeds. Now, to get an object to move faster, you need to give it some sort of push. An object that has more mass needs a bigger push than an object with less mass. If an object reached the speed of light, it would have an infinite amount of mass and need an infinite amount of push, or acceleration, to keep it moving. No rocket engine, no matter how powerful, could do this. In fact, as far as we know, nothing can exceed the speed of light.
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t = t' / sqrt(1-v^2/c^2)
t = t' / sqrt (1-1)
t = t'/sqrt(0)
t = t'/0
and we all know what happens when you try to divide by zero!
Hope this satisfactorily answers your question.
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For calculating relativity effects the speed must be less than the speed of light and more than zero. The speed of light gives you a nonsense answer.
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One year form what frame of reference?
For the traveler there wold be no time at all at 'C"..
For an Earthbound observer, one year.
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They'd both be 1 year. Just that 1 would go a farther distance.
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