What is the light-gathering power of a telescope directly proportional to?
A)the diameter of the primary mirror or lens
B)the focal length of the primary mirror or lens
C)the length of the telescope tube
D)the diameter of the eyepiece

Question

Quizplus · Accepted Answer

The light-gathering power of a telescope is directly proportional to the diameter of the primary mirror or lens. This is because a larger diameter allows more light to enter the telescope, resulting in greater image brightness and clarity. The focal length, length of the telescope tube, and diameter of the eyepiece do not directly affect the light-gathering power.

What Is the Light-Gathering Power of a Telescope Directly Proportional