Hello Everyone. I recently studied the Einstein special theory of relativity. I studied the thought experiment where a beam of light is thrown from a moving spaceship in the direction of its motion and the distance after a certain time interval was different from perspective of a man on spaceship from a man on earth (I understand this). the conclusion was that time on spaceship passed at a slower rate than on earth. My Question is that what if the light beam is thrown from back window of the spaceship opposite to its direction of motion? because in this case the result may be that time on earth passes slowly than that on spaceship. reversed effect from same experiment ??