Question

A biconvex lens made of a transparent material of ref. Index 1.25 is immersed in water of ref. Index 1.33 , will the lens behave as a converging lens? Give reason

Answer 1

Answer:

Since block is moving down the plane with constant speed

So here friction force on the block is counter balanced by weight along the incline plane while it is sliding down

now when block is pushed up the plane with initial speed "v"

then it has two forces along the incline plane opposite to the velocity

1. friction force

2. component of weight along the incline

so net force along the incline opposite to velocity

deceleration of the block is given by

now we have

so above is the distance it will travel along the incline before

Answer 2

A biconvex lens made of a transparent material of refractive index 1.25 is immersed in water of refractive index 1.33. ... The refractive of lens is lesser than the refractive index of the medium i.e., water. So. The lens will behave as a converging lens when light rays travel from lens to water.