[" 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 "]

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 thin converging glass lens made of glass with refractive index 1.5 has a power of +5.0 D. When this lens is immersed in a liquid of refractive index n, it acts as a divergent lens of focal length 100 cm. What must be the value of n?

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 ?

A corverging lens has a focal length of 20 cm in air. It is made of a material of refractive index 1.6 . If is immersed in a liquid of refractive index 1.3 , what will be its new focal length ?