Question- 1. The radius of curvature of the left & right surface of the concave lens are 10 cm & 15 cm respectively.
The radius of curvature of the mirror is 15 cm.
(A) equivalent focal length of the combination is -18 cm
(B) equivalent focal length of the combination is +36 cm
(C) the system behaves like a concave mirror
(D) the system behaves like a convex mirror.
air
Glass
(n=3/2)
water
2.
A plano-convex lens, when silvered at its plane surface is equivalent to a con