Question

When a ray of light travelling in air, strike obliquely a rectangular glass slab emerges out of it, it suffers lateral displacement. The magnitude of lateral displacement is directly proportional to the:

Options

• thickness of glass slab

• angle of incidence

• refractive index of glass slab

• all of these

Answer 1

All of these

Explanation:

Lateral displacement increases with the thickness of the slab, the angle of incidence and the refractive index of the glass. Therefore, each of the first three options is a factor, making “all of these” correct.