Converging lens of refractive index 1.5 is kept in a liquid medium having the same refractive index what would be the focal length of the lens in this medium?

A convex lens of refractive index 1.5 is immersed in a liquid of refractive index: 1.6 What will happen to the focal length and nature of lens ?

A convex lens of refrative index 1.5 is immersed in a liquid of refractive index: 1.5. what changes happen to the focal length of the lens in the three cases?

A glass of refractive index 1.45 disappears when immersed in a liquid. What is the value of refractive index of the light?

A converging lens has a focal length of 20 cm in air. It is made of a material of refractive index 1.6. If it is immersed in a liquid of refractive index 1.3, what will be the new focal length? How does the nature of the lens change. If this lens is immersed is a liquid of refractive index 1.8 ?

What happens when a convex lens of refractive index 1.2 is immersed in a liquid of refractive index 1.3?

A glass lens of refractive index 1.5 is placed in a trough of liquid. What must to be the refractive index of the liquid in order to make the lens diappear.

If the apparatus is immersed in a liquid of refractive index 1.35,what would be the width of the central fringe?

A lens is made of flint glass(refractive index=1.5).When the lens is immersed in a liquid of refractive index 1.25 ,the focal length

A concave lens made of a material of refractive index mu_g is immersed in a medium of refractive index mu_l , equal to and