what is the cause of dispersion of light on passing through a prism..
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Cause of dispersion of light: When light passes through a prism, the different frequencies of light travel at different velocities. Because of refraction, the different velocities make the angles of refraction different, causing the light to travel in slightly different directions
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The cause of dispersion is the change in speed of light with wavelength.when white light enters the first surface of a Prism ,light of different colours due to their different speeds in glasses gets deviated towards the base of the prism through different angles that is the Dispersion of white light into its constituent colours takes place at the first surface of prism.
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