According to Einstein's equivalence principle, which of the following cannot be distinguished from a system accelerating with uniform acceleration in the presence of no gravity by any measurement within the system?
A)a system moving with constant velocity in the presence of no gravitational force
B)a system that only contains massless objects
C)a system that is not accelerating, but is subject to a uniform gravitational acceleration
D)a system that is moving at the speed of light
E)a system in free fall

Question

Quizplus · Accepted Answer

Einstein's equivalence principle states that a system experiencing uniform acceleration is indistinguishable from a system at rest in a uniform gravitational field.

According to Einstein's Equivalence Principle, Which of the Following Cannot