Your friend travels from Earth to the Moon in a very fast rocket ship. Relative to you on Earth, how would your friend measure the distance she travelled and how long it took?

Question

Quizplus · Accepted Answer

According to the theory of relativity, as your friend moves at a very high speed, she would experience length contraction and time dilation. However, from her perspective inside the rocket (in her inertial frame), the distance to the Moon would appear shorter, and it would take less time to travel this distance compared to what you would measure from Earth.

Your Friend Travels from Earth to the Moon in a Very