What is refraction of light? Draw the diagram of refraction of light in glass slab. Write the laws of refraction.


Refraction of light in glass slab

Refraction is the bending of a wave when it enters a medium where its speed is different. We can define it as the change in direction of a wave passing from one medium to another or from a gradual change in the medium.

Laws of refraction state that:

  • The incident ray refracted ray, and the normal to the interface of two media at the point of incidence all lie on the same plane.
  • The ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant. This is also known as Snell’s law of refraction.

sin i/sin r = constant

μ1 sin i = μ2 sin r

Watch the video for understanding more on refraction

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