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A simple telescope, consisting of an obj...

A simple telescope, consisting of an objective of focal length `60 cm` and a single eye lens of focal length `5 cm` is focussed on a distant object is such a way that parallel rays comes out from the eye lens. If the object subtends an angle `2^(@)` at the objective, the angular width of the image.

Text Solution

Verified by Experts

`f_(0)=60cm` and `f_(3)=5cm`
Magnification `M=(f_(0))/(f_(e))=(beta)/(alpha)`
or`60/5=(beta)/(2^(@))`
`:.beta=24^(@)`
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