If you can travel at velocity of light then what happens to time?

Answer 1

If I pass you at the speed of light, then:

-- I see my wristwatch moving normally; but you look at it as I pass you, and you say that

my watch is not moving at all.

-- You see your wristwatch moving normally; but I look at it as I pass you, and I say that

your watch is not moving at all.

You probably want to know what happens to "real time". I'm really delighted to be able to say that there's

no such thing. Just like everything else, it's all relative, and depends on the relative motion of the observers.

Answer 2

As a reference frame approaches the speed of light, time dilation occurs. From the perspective of an observer moving at a velocity close to the speed of light, time for a stationary observer would appear to slow down. This effect follows from Einstein's theory of relativity.