A telescope has a primary with a focal length of 1500 mm and an eyepiece with a focal length of 15 mm. What is the magnifying power of the telescope?
A) 0.01
B) 15
C) 100
D) 1500

Question

Quizplus · Accepted Answer

The magnifying power of a telescope is given by the ratio of the focal length of the primary lens (or mirror) to the focal length of the eyepiece. Thus, magnifying power = 1500 mm / 15 mm = 100.

A Telescope Has a Primary with a Focal Length of 1500