The colour of light which is deviated the lea | vedclass

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(A) When white light passes through a prism,it splits into its component colours,a phenomenon known as dispersion.According to Cauchy's dispersion for

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red

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(A) When white light passes through a prism,it splits into its component colours,a phenomenon known as dispersion.According to Cauchy's dispersion formula,the refractive index of a material depends on the wavelength of the light.The refractive index is inversely proportional to the wavelength of light.Red light has the longest wavelength in the visible spectrum,which results in the lowest refractive index for the prism material.Since the angle of deviation is directly related to the refractive index,the colour with the lowest refractive index undergoes the least deviation.Therefore,red light is deviated the least,while violet light,having the shortest wavelength,is deviated the most.

The colour of light which is deviated the least by a prism in the spectrum of white light is

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