A telescope consisting of an objective of focal length 60 cm and a single–lens eyepiece of focal length 5 cm is focussed at a distant object in such a way that parallel rays emerge from the eye piece. If the object subtends an angle of `2^(@)` at the objective, then find the angular width of the image.

Explanation

`MP = (f_(0))/(f_(e)) = (beta)/( alpha)`
`rArr beta= alpha .(f_(0))/( f_(e)) = 2^(@) xx (60)/(5) = 24^(@)`