HongKongEvil

To Janus:

Thx for answering, I know what's wrong wiht me, I have a clearer understanding

Someone redirect my post so you don't see my previous message

Imagine a space craft is moving towards me with speed 0.6C, I shoot a laser with frequency "f" to a spacecraft,the reflected laser frequency should be 2.56f, right?

But for the people inside spacecraft, the frequency of original and reflected laser must be the same

The what happened?

Someone redirect my post so you don't see my previous message

Imagine a space craft is moving towards me with speed 0.6C, I shoot a laser with frequency "f" to a spacecraft,the reflected laser frequency should be 2.56f, right?

But for the people inside spacecraft, the frequency of original and reflected laser must be the same

The what happened?

I think of this question for a long time too, no one give meaningfully answer to this.....

I understand in case of light shoot out and than reflect back the time dilation calculation is correct for all direction

But consider different path, In view light speed is constant:-

A object moving towards us, its time should run faster than us

A object moving away us, its time should run slower than us

Its a simple calculation but no one can tell what's happening