Suppose you drop a clock toward a black hole.As you look at the clock from a high orbit,what will you notice?
A)Time on the clock will run faster as it approaches the black hole,and light from the clock will be increasingly blueshifted.
B)The clock will fall toward the black hole at a steady rate,so that you'll see it plunge through the event horizon within just a few minutes.
C)The clock will fall faster and faster,reaching the speed of light as it crosses the event horizon.
D)Time on the clock will run slower as it approaches the black hole,and light from the clock will be increasingly redshifted.

Question

Quizplus · Accepted Answer

According to general relativity, time passes more slowly in strong gravity. As the clock approaches the black hole, the gravitational pull becomes stronger and time on the clock will run slower. This is due to time dilation. Additionally, light from the clock will be increasingly redshifted because the gravitational pull of the black hole causes a shift in the frequency of light. Therefore, D is the correct choice.

Suppose You Drop a Clock Toward a Black Hole