A lens of refractive index n is put in a liquid of refractive index `n'`. If focal length of lens in air is `f`, its focal length in liquid will be.

A lens of refractive index mu is put in a liquid of refractive index mu' . If focal length of lens in air is f , its focal length in liquid will be.

A diverging lens of focal length 10 cm having refractive index 1.5 is immersed in a liquid of refractive index 3. The focal length and nature of the lens in liquid is

A bi-convex lens made of glass (refractive index 1.5) is put in a liquid of refractive index 1.7. Its focal length will

Focal length of thin lens of refractive index 1.5 is 15 cm. When placed on liquid of refractive index 4/3 , then its focal length will be ...... cm.

Flint glass lens is made of refractive index 1.5. When it is placed in a liquid of refractive index 1.25, then its focal length will be ....

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 lens of refractive index mu becomes a lens of focal length f' when immersed in a liquid of refractive index mu '. If the focal length of the lens in air is f, prove that f' = f.(mu'(mu-1))/((mu-mu')) .