What is the speed of a photon with respect to another photon if:
- the two photons are going in the same direction.
- they are going in opposite direction?
I think the answer to the first question should be zero and to the second one be 2xC; C⇒speed of light.
But at the same time i think that the speed of anything can't exceed C, thus my second answer should be wrong. I also feel the we cannot have an inertial frame which is traveling at the speed C as then the Newtonian laws of motion will fail.
I don't know much about Relativity, and am pretty confident about some flaws in my approach.
Please help me and clarify my concepts.