A spaceship of proper length L is moving with respect to the ground with speed v. As measured on the ground, how much time does a light signal need to get from the front to the end of the spaceship.
The Attempt at a Solution
The right answer is L/[γ(c+v)]
I don't understand how to get the answer from either possibilites. Where, conceptually, I'm misunderstanding the equations.
Distance of Spaceship Viewed From the Ground
L'=L/γ = L/γ
v+c? But isn't light supposed to travel at the same speed in all reference frames?
Additionally, how would I approach the question using the equation t'=tγ?