Immiscible transparent liquids A,B,C,D and E are placed in a rectangular container of glass with the liquids making layers according to their densities. The refractive index of the liquids are shown in the adjoining diagram. The container is illuminated from the side and a small piece of glass having refractive index 1.61 is gently dropped into the liquid layer. The glass piece as it descends downwards will not be visible in

A vessel is half filled with a liquid of refractive index μ. The other half of the vessel is filled with an immiscible liquid of refractive index 1.5μ. The apparent depth of vessel is 50% of the actual depth. The value of μ is

In the figure shown the angle made by the light ray with the normal in the medium of refractive index √2 is :

When the rectangular metal tank is filled to the top with an unknown liquid, as observer with eyes level with the top of the tank can just see the corner E; a ray that refracts towards the observer at the top surface of the liquid is shown. The refractive index of the liquid will be nearly :

A fish rising vertically up towards the surface of water with speed 3 ms–1 and a bird diving vertically down towards it with speed 9 ms–¹. The velocity of bird with respect to fish and velocity of fish with respect to bird will be :

A small fish 0.4m below the surface of a lake , is viewed through a simple converging lens of focal length 3m. The lens is kept at 0.2 m above the water surface such that fish lies on the optical axis of the lens. The image of the fish seen by observer will be at \[v\]

The image of point P when viewed from top of the slabs will be :