Suppose an astronaut is far from a planet with a very strong gravitational field. The astronaut is also watching a clock on the surface of this planet. During the time in which his own clock ticks out a time of 1 hour, how much time does the clock on the planet tick out?
A) less than 1 hour (but more than zero)
B) no time at all
C) more than 1 hour
D) exactly 1 hour, the same as the astronaut's clock

Question

Quizplus · Accepted Answer

Due to the effects of gravitational time dilation, as predicted by general relativity, time passes more slowly in stronger gravitational fields. Therefore, the clock on the planet's surface, which is in a stronger gravitational field, would tick out less time compared to the astronaut's clock far from the planet.

Suppose an Astronaut Is Far from a Planet with a Very