Which colour of the white light is deviated by a glass prism (i) the most and, (ii) the least?
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As we know, that the deviation caused by a prism increases with the decrease in the wavelength of light.
(i) In visible light, the violet colour ( wavelength = 4000 Å) is deviated the most.
(ii) In visible light, the red colour ( wavelength = 8000 Å) is deviated the least.
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