Which feature(s)of a telescope determine its magnifying power?
A)diameter of the primary only
B)focal length of the primary only
C)primary diameter and focal length of the eyepiece
D)focal length of the primary and eyepiece

Question

Quizplus · Accepted Answer

The magnifying power of a telescope is determined by the focal length of the primary lens or mirror and the focal length of the eyepiece. The diameter of the primary lens or mirror determines its light-gathering ability and resolution, but it does not directly affect the magnifying power. Therefore, the best choice is D, which includes both the focal lengths of the primary and eyepiece.

Which Feature(s)of a Telescope Determine Its Magnifying Power