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How two prisms should be placed to obtain white light draw it's diagram​

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Answer:

Consider two equivalent, triangular HOLLOW prisms A and B MADE of thin glass PLATES and arranged with negligible spacing as shown in the figure. A beam of white light is incident on prism A from the left. Given that the refractive index of water is inversely related to temperature, the beam to the right of prism B WOULD NOT APPEAR white if :

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