Two identical clocks are made. One is placed on the surface of a massive planet, and the other is placed in interstellar space. Which runs faster?
A) Both clocks will run at the same rate.
B) The planet clock
C) The space clock

Question

Quizplus · Accepted Answer

The space clock runs faster due to the effects of gravitational time dilation. According to general relativity, time passes more slowly in stronger gravitational fields, so the clock on the surface of a massive planet would run slower compared to the clock in interstellar space where the gravitational field is weaker.

Two Identical Clocks Are Made