Physics
When sunlight passes through water droplets in the atmosphere it gets dispersed into its constituent colours forming a rainbow. A similar phenomenon is observed when white light passes through a prism.
(a) Which colour will show the maximum angle of deviation and which colour will show the minimum angle of deviation?
(b) If Instead of sunlight, a green-coloured ray is passed through a glass prism. What will be the colour of the emergent ray?
Spectrum
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Answer
(a) As the angle of deviation depends directly on the refractive index of a given transparent medium which is itself inversely proportional to the wavelength of light so the angle of deviation decreases with the increase in the wavelength of light. Thus, for visible light the angle of deviation of a prism is maximum for violet colour and minimum for red colour.
(b) A green-coloured ray is a single colour light and hence a prism can not split a single light so the emergent ray will be of green colour.
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