Question

Explain the function of a prism in dispersion of light.​

Answer 1

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What is the function of a despersive prism ?

Dispersive prisms are used to break up light into its constituent spectral colors because the refractive index depends on frequency.

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What happens when light is dispersed by a prism?

Visible light, also known as white light, consists of a collection of component colors.Upon passage through the prism, the white light is separated into its component colors - red, orange, yellow, green, blue and violet. The separation of visible light into its different colors is known as dispersion.

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What is a common example of dispersion?

Rainbow forms when sunlight hits the water droplets suspended in the atmosphere and undergoes total internal reflection. This dispersion or breaking up of light into several colors is what forms the rainbow. Hence, rainbow is an example of dispersion of sunlight.

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Answer 2

Answer:

Dispersive prisms are used to break up light into its constituent spectral colors because the refractive index depends on frequency; the white light entering the prism is a mixture of different frequencies, each of which gets bent slightly differently.