Refract means bending. The bending of ray of light when it pass from one medium to another medium is known by a term called refraction.

Refraction of Light Definition and Introduction Physics Class 10

Refraction of Light happens due to different speed of light in different medium. Speed of light in air is 3×10⁸m/s and that of in glass is 2×10⁸m/s.

Refraction of Light: It can be defined as the change in the direction of light when it passes from one medium to another medium obliquely.

A transparent substance in which light can travel is called a medium. For example Air, water, glass, kerosene etc are the transparent substances in which light can travel.

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