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Describe the refraction of light through...

Describe the refraction of light through prism. Draw the diagram and explain

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Prism is a transparent optical element which refracts light. An optical object to be defined as prism must have at least two faces with an angle between them. Triangular prism is the most common type of prism. It has a triangular base and rectangular sides
When a ray of light enters the prism, it bends towards the normal, because light is entering from a rarer medium to a denser medium. Similarly, when the light emerges from the prism, it follows the laws of refraction of light. Due to the angle of the prism and due to different wavelength of different components of white light, the emergent ray gets segrated into different colours. Finally, a colouful band of seven colours is obtained. This phenomenon is called dispersion of white light by the prism.
Refraction of light through prism

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