state the cause of depression of white light by a glass prism .how did Newton using two identical glass prism show that white light is made up of seven colours? draw a ray diagram to show the path of a narrow beam of white light, through a combination of two identical prisms arranged together in inverted position with respect to each other ,when it is allowed to fall obliquely on one of the faces of the first prism of the combination
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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 prism ,light of different colors due to their diff. Speed in glasses gets deviated towards the base of the prism through different angles that is the dispersion of white light into it's constituent colors takes place at the first surface of prism.
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Bhai thora to kamm likh lata
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