A beam of light travelling in air is incident on water. Draw a ray-diagram indicating the change in its path in water.

When a beam of light travelling in air enters water, it bends towards the normal.

Explanation

The angle of refraction or the amount of bending of light depends on the refractive index  of the two media.

When light passes through a low refractive index, like air (faster medium or optically rarer medium) to a high refractive index, like water (slower medium or optically denser medium), its speed decreases and bends towards the normal, making the angle of refraction smaller than the angle of incidence.

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Updated on: 10-Oct-2022

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