Q1.

A person in a boat sees a fish in the water (n = 1.333), the light rays making an angle of 42 relative to the water's surface. What is the angle (in degrees) relative to the water's surface of the same rays when beneath the surface?

Q2.

A fish is 25 cm below the surface of a pond. What is the apparent depth (in cm) when viewed from a position almost directly above the fish? (For water, n = 1.333)

Q3.

Light strikes a diamond (n = 2.42) at an angle of 32 relative to the normal to the surface. What is the angle of refraction?

Q4.

A layer of liquid-A water (n = 1.252) floats on liquid-B carbon tetra-chloride (n = 1.559) contained in an aquarium. What is the critical angle at the interface between the two liquids?

Q5.

A person looking into an empty container of depth h = 18 cm can see up to a distance d = 15 cm as shown in the figure. If water is filled to a depth Y = 5 cm, what will be the new distance X to which the bottom of the container can be seen. Use refractive index of water = 1.333