JEE Advanced 2020 Full Test 6 Paper 1

A large concave mirror with a radius of curvature of 0.5m is placed on a horizontal plate. We pour a small amount of water into the mirror and place on it a plano-convex lens with a radius of curvature of 1.0m whose plane side just covers the water. Then we place a point light source above this set-up at a height of 0.3m. The distance (in metres) from the object where the final image is formed will be ‌

x

90

. Find x given that the refractive index of water is ‌

4

3

and the refractive index of glass is 1.50.