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Question

What is a spectrum? Why do we get a spectrum of seven colours when white light is dispersed by a prism?

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The band of seven colors obtained, when a white light splits into its constituent colors on striking the surface of glass prism is called as a spectrum. A beam of white light splits into the spectrum of seven colors when it is passed through a prism because of the difference in the angle of refraction of different colors.

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Q1
What is a spectrum? Why do we get a spectrum of seven colours when white light is dispersed by a prism?
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Draw a diagram to show how white light can be dispersed into a spectrum by using a glass prism. Mark the various colours of the spectrum.
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When white light splits in seven colours, the phenomenon is called spectrum.
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