Which color of light has the minimum velocity | vedclass

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(D) When white light passes through a prism,it undergoes dispersion into its constituent colors.Different colors travel at different speeds within the

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Violet

Vedclass · Answer

(D) When white light passes through a prism,it undergoes dispersion into its constituent colors.Different colors travel at different speeds within the medium of the prism.The refractive index $(n)$ of a material is related to the velocity of light $(v)$ by the formula $n = c/v$,where $c$ is the speed of light in a vacuum.According to Cauchy's dispersion formula,the refractive index is higher for light with a shorter wavelength.Violet light has the shortest wavelength in the visible spectrum,which results in the highest refractive index for the prism material for violet light.Since $v = c/n$,a higher refractive index $(n)$ leads to a lower velocity $(v)$.Therefore,violet light travels with the minimum velocity in a prism.

Which color of light has the minimum velocity in a prism?

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