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.

Options

A. `10^(@)`
B. `24^(@)`
C. `50^(@)`
D. `(1//6)^(@)`

Answer

B

Explanation

`M=(beta)/(alpha)=(f_(0))/(f_(e))" "therefore" "beta=(f_(0))/(f_(e))alpha=(60)/(5)xx2^(@)=24^(@)`