Question

It is possible to observe total internal reflection when light travels from ______.

Options

• air to water

• air to glass

• water to glass

• glass to water

Answer 1

It is possible to observe total internal reflection when light travels from glass to water.

Explanation:

Total internal reflection occurs when light travels from a denser medium to a rarer medium, and the angle of incidence exceeds the critical angle. Because glass is denser than water, total internal reflection can occur when light travels from glass to water, but it cannot occur in the reverse direction or when light travels from air to either water or glass.