Simultaneity: A rocket is moving at 1/4 the speed of light relative to Earth. At the center of this rocket, a light suddenly flashes. To an observer at rest on Earth,
A) the light will reach the front of the rocket at the same instant that it reaches the back of the rocket.
B) the light will reach the front of the rocket before it reaches the back of the rocket.
C) the light will reach the front of the rocket after it reaches the back of the rocket.

Question

Quizplus · Accepted Answer

Due to the motion of the rocket relative to the Earth, the back of the rocket is moving towards the point where the light was emitted, while the front is moving away. Thus, the light reaches the back of the rocket before it reaches the front, as observed from Earth.

Simultaneity: a Rocket Is Moving at 1/4 the Speed of Light