Which of the following depends on the observer's frame of reference?
A) all of the other answer choices
B) the length of a meter stick
C) the mass of the proton
D) the half-life of a muon

Question

Quizplus · Accepted Answer

The length of a meter stick (B) can appear different due to relativistic length contraction, depending on the observer's velocity relative to the stick. The mass of a proton (C) can also appear to increase from another frame of reference due to relativistic effects. Similarly, the observed half-life of a muon (D) can vary due to time dilation. Therefore, all these phenomena depend on the observer's frame of reference.

Which of the Following Depends on the Observer's Frame of Reference