Q.
A point like object is placed at a distance of 1m in front of a convex lens of focal length 0.5m.A plane mirror is placed at a distance of 2m behind the lens. The position and nature of the final image formed by the system is :
Object is at 2f. So image will also be at ' 2f′ (I1)
Image of I1 will be 1m behind mirror.
i.e. ⇒I2
Now I2 will be object for lens. ∴u⇒−3m f⇒+0.5m v1⇒f1+u1 ⇒+0.51+−31 v⇒53⇒0.6m
So total distance from mirror ⇒2+0.6 ⇒2.6m and real image