Question

Immiscible transparent liquids A, B, C, D and E are placed in a rectangular container of glass with the liquids making layer. 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 naving refractive index 1.61 is gently dropped into liquid layer. The glass piece as it descends downwards will not be visible in

• A. Liquid A and B only
• B. Liquid C only
• C. Liquid D and E only
• D. Liquid A, B, D and E

Answer 1

The correct option is B Liquid C only

Refractive index of liquid $C$ is same as that of glass piece. So it will not be visible in liquid $C$.