Physics - Geometrical Optics Question with Solution | TestHub

For Total internal reflection, $i>i_{\mathrm{c}}$ so, $\sin i>\sin i_c$ $\sin 45^{\circ }>\frac{1}{\mu }$$\Rightarrow \mu =\sqrt{2}$$\Rightarrow \mu =1.414$Since$\mu$of green and violet is greater than$1.414$, so they will undergo total internal reflection. But red colour will be refracted. So the prism will separate red colour from the green and blue colours.