- #1
djerry
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Homework Statement
An optical telescope with a 12mm eyepiece makes the Moon appear to have an angular
diameter of 30 degrees. What is the focal length of the telescope's objective?
Homework Equations
magnification=focal length of objective/focal length of eyepiece
The Attempt at a Solution
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I'm not sure what I'm able to do given a diameter and angular diameter in order to get the magnification and focal length of the eyepiece as needed.