A stationary swimmer `S`, inside a liquid of refractive index `mu_(1)`, is at a distance `d` from a fixed point `P` inside the liquid. A rectangular block of width `t` and refractive index `mu_(2)(mu_(2) lt mu_(1))` is now placed between `S` and `P.S` will observer `P` to be at a distance

An equiconvex lens of refractive index mu_(2) is placed such that the refractive :

A prism of refractive index mu_g deviates the incident ray towards its base. If it is immersed in a transparent liquid of refractive index mu_1 such that mu_1 gt mu_g then prism would

A prism of refractive index mu_g deviates the incident ray towards its base. If it is immersed in a transparent liquid of refractive index mu_1 such that mu_1 gt mu_g then prism would

A transparent cube of side d, made of a material of refractive index mu_(2) , is immersed in a liquid of refractive index mu_(1)(mu_(1)ltmu_(2)) . . A ray is incident on the face AV at an angle theta (shown in the figure). Total internal refraction takes place at point E on the face BC. Then must satisfy:

A transparent cube of side d, made of a material of refractive index mu_(2) , is immersed in a liquid of refractive index mu_(1)(mu_(1)ltmu_(2)) . . A ray is incident on the face AV at an angle theta (shown in the figure). Total internal refraction takes place at point E on the face BC. Then must satisfy:

A transparent cube of side d, made of a material of refractive index mu_(2) , is immersed in a liquid of refractive index mu_(1)(mu_(1)ltmu_(2)) . . A ray is incident on the face AV at an angle theta (shown in the figure). Total internal refraction takes place at point E on the face BC. Then must satisfy:

A convex lens made up of a material of refractive index mu_(1) is immersed in medium of refractive index mu_(2) as shown in the figure. The relation between mu_(1) and mu_(2) is

If refractive index of core & cladding are mu_(1)&mu_(2) respectively then :