
Originally Posted by
Janus
Doing this gives a time dilation factor of

When we apply the given, which certainly is verified, but we verify again.
We verify by my terms:
A. The moving mans passing lights speed compared to:
The moving mans passing lights speed measured by the still man,
has the relation c : (c - v)
B. The moving man has a width L. The time it takes for light to pass the moving man measured by him is allways L/c is constant. This time multiplied by c is the length which he allways will experience same. The still man measures that the passing time is L/c and that c*(passing time) = L however.
The relation between the moving mans passing lights speed and the moving mans measured passing lights speed measured by the still man is c : (c-v)
Summation:
The moving mans length and passing time compared to:
The moving mans length and passing time measured by the still man,
has the relation c : (c - v)