The focal length of the objective lens of a telescope is 75.0 cm, and the eyepiece has a focal length of 6.00 cm. What is the magnification of this telescope?
A) 12.5
B) 200
C) 0.645
D) 450
E) 0.0800

Question

Quizplus · Accepted Answer

The magnification of a telescope is given by the ratio of the focal length of the objective lens to the focal length of the eyepiece. Thus, magnification = 75.0 cm / 6.00 cm = 12.5.

The Focal Length of the Objective Lens of a Telescope