Linked Questions

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Is time dilation real? [duplicate]

If a body with an accurate clock is moving away from A which is stationary, then the time in B would be slower than that in A. Since relative to B A would have an equal velocity time in A would be ...
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2answers
2k views

Why does moving near light speed keep you young? [duplicate]

As was shown in the movie Interstellar, when you go close to a black hole or move near the speed of light in space, then your clock runs slower than a clock on Earth. In the movie, Matthew ...
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1answer
522 views

Is time dilation an illusion? Variation on the twins paradox [duplicate]

Consider the twins paradox with a slight variation: Twins A and B are in separate space ships both capable of going at the speed of light instantly (i.e. without any acceleration). Both ships are ...
1
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4answers
293 views

Does time really slow down in relativity, or is it an illusion caused by the Doppler shifting of light? [duplicate]

Does time really dilate, or is it only how we perceive time, which is in the form of light waves. When an object moves away from another object at very high speeds, the light takes longer to reach it ...
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2answers
247 views

Time dilation in outer space vs in a gravitational field? [duplicate]

I have been wondering how could aging process differ for a person moving close to velocity of light or for a person close to a very strong gravitational field compared to a person who is in a slow ...
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1answer
112 views

Time Dialation in Uniform Motion [duplicate]

Is there EVIDENCE (proof) that time dilation actually occurs in the case of relative UNIFORM mottion (i.e., where no acceleration or decelleration occurs)? By proof, I don't mean mathematically but, ...
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1answer
92 views

How can we assume that reaching the speed of light slows down time? [duplicate]

How can we assume that gaining the speed of light slows down time?
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0answers
18 views

An experimentation on time dilation [duplicate]

In the video https://www.youtube.com/watch?v=ev9zrt__lec from 03:00 to 05:00 I hope that both the clocks would read the same equal amount ,say,1 revolution, in measuring the time elapsed for the ...
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3answers
4k views

Time dilation as an observer in special relativity

I've been having a discussion regarding time dilation relating to special relativity and how it should be observed from the FoR (Frame of Reference) of "the person moving" : I assert- If we have a ...
2
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1answer
422 views

Why does only one twin travel in the twin paradox?

The wikipedia page repeatedly says that the twin travelling in space is the only one which travels, and also is the only one which faces acceleration and deceleration. So it does not age, while the ...
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3answers
144 views

Does a human cell age the same speed as a quartz clock?

When discussing how time slows down when you are going very fast, it's always explained with a clock, the clock slows down, cetera. But is it possible that a human cell, or molecules in general don't ...
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0answers
59 views

Is time dilation a mechanical slowdown only? [duplicate]

I've recently read about the time dilation occurs at very high speeds. But I'm really wondering if it is just a mechanical slowdown of the clock only? What if we use clocks that does not use moving ...