Which property of a telescope determines its light-gathering power?
A)the focal length of the objective
B)the focal length of the eyepiece
C)the diameter of the objective
D)the length of the telescope tube

Question

Quizplus · Accepted Answer

The diameter of the objective determines the light-gathering power of a telescope. This is because a larger objective can capture more light from the viewed object, allowing for a brighter and clearer image. The other properties listed may affect the magnification or clarity of the image, but they do not impact the light-gathering power.

Which Property of a Telescope Determines Its Light-Gathering Power