Determine the position of the image produced by an optical system consisting of a concave mirror with a focal length of `10 cm` and a convergent lens with a focal length of `20 cm.` The distance from the mirror to the lens is `30 cm` and from the lens to the object is `40 cm.` Consider only two steps. Plot the image.

Answer

A, C, D

Explanation

Object is placed at distance `2f` from the lens.
Hence, image is also formed at distance `2f` on
other side. For mirror,

`1/v+1/(+10)=1/(-10)`
Ray diagram is as shown below.