A flickering signal is received from a source the size of the Sun. What frequencies are possible for this flicker?

Question

Quizplus · Accepted Answer

The size of the source is given to be the size of the Sun, which has a diameter of about 1.4 million kilometers. Based on the relationship between angular size and frequency, a source the size of the Sun can only produce flickers at a frequency of 0.21 cycles per second or less. Therefore, option C is the correct answer. Option A is incorrect because not all frequencies are possible for a source of a given size. Option B and D are incorrect based on the given information.

A Flickering Signal Is Received from a Source the Size