An astronomical telescope has an objective of diameter 20 cm with a focal length of 180 cm. the telescope is used with an eyepiece of focal length 30 mm. what is the angular mag…

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asked Aug 28, 2019 83.0k views

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Cinsere · Answer 1 · 2019-09-02T23:48:06+0000

By definition;
M = fo/fe

Where,
M = Angular magnification
fo = Focal length of objective lens
fe = Focal length of eyepiece lens

From the information given;
M = 180/30 = 6

An astronomical telescope has an objective of diameter 20 cm with a focal length of 180 cm. the telescope is used with an eyepiece of focal length 30 mm. what is the angular mag…

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