This is not schoolwork.
Imagine that light did not have a constant speed, but behaved in the manner expected from experience. Namely, if the source of the light is rushing toward you, the light will approach you faster; if the source is rushing away from you, the light will approach you slower...
Homework Statement
If one light beam is heading toward you from the right, and another is heading toward you from the left, how quickly from the perspective of the right-moving beam is the left-moving beam approaching it?
1) 0
2) c
3) 1.5c
4) 2c
Homework Equations
(v+w) / (1 + cw/c2)
The...