A particular reflecting telescope has a primary mirror 0.4 m in diameter and 4.0-m focal length and an eyepiece lens 1.0 cm in diameter and 2.0-cm focal length. What is the magnifying power of this telescope?
A) 20×
B) 200×
C) 40×
D) 400×

Question

Quizplus · Accepted Answer

The magnifying power of a telescope is given by the ratio of the focal length of the primary mirror to the focal length of the eyepiece. Thus, magnifying power = (4.0 m / 0.02 m) = 200×.

A Particular Reflecting Telescope Has a Primary Mirror 0