A convex lens of focal length 25 cm is placed at a distance

Last updated: 6/19/2023

A convex lens of focal length 25 cm is placed at a distance x from a concave lens of focal length 7 cm When a parallel beam is incident on the convex lens it emerges as a parallel beam out of the concave lens What is the value of x Options 20 cm 18 cm 25 cm 32 cm