The diagram below shows two identical prisms A and B placed with their faces parallel to each other. A ray of light of single colour PQ is incident at the face of the prism A. Complete the diagram to show the path of the ray till it emerges out of the prism B.

[Hint: The emergent ray out of the prism B will be parallel to the incident ray PQ]

A ray of light incident at an angle of incidence 48° on a prism of refracting angle 60° suffers minimum deviation. Calculate the angle of minimum deviation. [ Hint — δ_min = 2i - A ]

An object when placed in a denser medium and is viewed from a rarer medium appears to be at a lesser depth than real death. This is because of :

1. reflection
2. refraction
3. dispersion
4. diffraction

Refractive index of a liquid can be found using :

1. μ = real depth x apparent depth
2. μ = apparent depth/real depth
3. μ = real depth/apparent depth
4. none of the above