The refractive index of material of a convex lens is

Last updated: 5/31/2023

The refractive index of material of a convex lens is changing with time as 1 x sin oot At 0 the focal length of the lens is f and Ho ao are constant a is very small A luminous poin object is placed on principal axis at a distance 3f from the optical centre The image appears to oscillate simple harmonically the amplitude of oscillation of image is 9af o A B 4 10 1 C 3af o 2 Ho 1 9af o 2 10 1 D none