As a spaceship nears an event horizon, a clock on the spaceship will be observed:
A)to run faster.
B)to stop.
C)to run slowly.
D)to run backwards.
E)to run the same as one on Earth.

Question

Quizplus · Accepted Answer

As the spaceship approaches the event horizon, it will experience extreme gravitational forces, causing time dilation. This means that time will appear to pass more slowly on the spaceship relative to time on Earth. Therefore, a clock on the spaceship will be observed to run slowly. According to the theory of relativity, time appears to run slower in a region with a strong gravitational field. Therefore, as the spaceship nears the event horizon (which is a region of extremely strong gravity), the clock on the spaceship will appear to run slower from the perspective of an observer outside.

As a Spaceship Nears an Event Horizon, a Clock on the Spaceship