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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…

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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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 magnification of this telescope?

User Ismelda
by
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1 Answer

2 votes
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
User Cinsere
by
8.1k points
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