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Question: A simple telescope consisting of an objective of focal length 60 cm and eye lens of focal length 5 c...

A simple telescope consisting of an objective of focal length 60 cm and eye lens of focal length 5 cm is focused on a distant object. If the object subtends an angle of 2° at the objective lens, the angular width of image is –

A

500

B

(16)∘\left( \frac{1}{6} \right)^{{^\circ}}

C

100

D

240

Answer

240

Explanation

Solution

MP = βα\frac { \beta } { \alpha } = \ β2\frac { \beta } { 2 } = 605\frac { 60 } { 5 } Ž b = 240