Which of the following operations would increase the angular magnification of a

Question

Which of the following operations would increase the angular magnification of a refracting telescope? (There may be more than one correct choice.)

A: Increase the focal length of the objective lens.
B: Increase the focal length of the eyepiece.
C: Decrease the focal length of the objective.
D: Decrease the focal length of the eyepiece.
E: Increase the focal length of both the objective lens and the eyepiece by the same factor.

Type the letters corresponding to all the correct answers in alphabetical order. Do not use commas. For instance, if you think that only answers and are correct, type .

Explanation / Answer

Angular mag=fo/fe So answer is A) and D)

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