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Explain briefly, with the help of a neat labelled diagram, how does white light gets dispersed by a prism.On which surface of the prism, there is both the dispersion and deviation of light, and on which surface of the prism, there is only the deviation of light?
Explain briefly, with the help of a neat labelled diagram, how does white light gets dispersed by a prism.
On which surface of the prism, there is both the dispersion and deviation of light, and on which surface of the prism, there is only the deviation of light?
Class 10 | ICSE | Physics | Selina | Spectrum
Explain briefly, with the help of a neat labelled diagram, how does white light gets dispersed by a prism.
On which surface of the prism, there is both the dispersion and deviation of light, and on which surface of the prism, there is only the deviation of light?

When white light enters the initial surface of a prism, light of different colours deviates through distinct angles towards the prism due to their varied speeds in glass. The dispersion of white light into its constituent colours takes place at the prism’s initial surface.

Only refraction occurs on the prism’s second surface, and various colours deviate through different angles, causing the colours to become further separated during refraction (violet deviates the most and red the least).

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