Quote:
Originally Posted by sjastro
An understanding of special relativity is required here.
At very high velocities approaching and including the speed of light (=c), velocities don't add vectorially.
For example if two objects approach each other at a velocity v, then their approach velocity relative to each other is 2v.
At high velocities their approach velocity is 2v/(1+(v/c)^2)
If each object (photon) approaches each other at a speed c, then the
approach velocity is 2c/(1+(c/c)^2)= c
Regards
Steven
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I am going to have to take that on faith alone. It sounds like fancy bookeeping to me I'm afraid.
Peter