A glass lens is placed in a medium in which it is found to behave like a glass plate. Refractive index of the medium will be

A glass concave lens is placed in a liquid in which it behaves like a convergent lens. If the refractive indices of glass and liquid with respect to air are ""_(a)mu_(g)and""_(a)mu_(l) respectively, then

A glass concave lens is placed in a liquid in which it behaves like a convergent lens. If the refractive indices of glass and liquid with respect to air are ""_(a)mu_(g)and""_(a)mu_(l) respectively, then

Fill in the blank spaces with appropriate answers: The nature of a lens changes if it is placed in a medium whose refractive index is __ than the refractive index of the material of the lens.

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.

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

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

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

A lens of refractive index 1.5 is kept in a medium of refractive index 1.5. The refractive index of the lens with respect to the medium will be