The critical angle of light passing from glas | vedclass

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(D) The formula for the critical angle is given by $	heta_c = \sin^{-1}(1/n)$,where $n$ is the refractive index of the medium.According to Cauchy's d

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Violet

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(D) The formula for the critical angle is given by $	heta_c = \sin^{-1}(1/n)$,where $n$ is the refractive index of the medium.According to Cauchy's dispersion formula,the refractive index $n$ is inversely proportional to the wavelength $\lambda$ of light.In the visible spectrum $VIBGYOR$,the wavelength $\lambda$ increases from violet to red.Therefore,the refractive index $n$ is maximum for violet light and minimum for red light.Since $	heta_c$ is inversely proportional to $n$,the critical angle $	heta_c$ will be minimum for the color that has the maximum refractive index.Thus,the critical angle is minimum for violet light.

The critical angle of light passing from glass to air is minimum for which color of light?

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