To provide large magnification,a telescope should have an objective with a _____ and an eyepiece with a _____.
A)long focal length; short focal length
B)long focal length; long focal length
C)short focal length; short focal length
D)short focal length; long focal length
E)large diameter; short focal length

Question

Quizplus · Accepted Answer

A telescope's magnification is determined by the ratio of the focal length of the objective lens (or primary mirror) to the focal length of the eyepiece. A long focal length for the objective and a short focal length for the eyepiece result in higher magnification.

To Provide Large Magnification,a Telescope Should Have an Objective with a _____