Refractive index of glass is $\frac{3}{2}$ and that of water is $\frac{4}{3}$, If c is the critical

Question

Refractive index of glass is $\frac{3}{2}$ and that of water is $\frac{4}{3}$, If c is the critical angle. Sin c is\

Professor PC Thomas Classes · Answer

$\mathrm{n}_{\mathrm{g}}=\frac{3}{2} \quad \mathrm{n}_{\mathrm{w}}=\frac{4}{3}$\ en $_{\mathrm{g}}=\frac{\mathrm{n}_{\mathrm{g}}}{\mathrm{n}_{\mathrm{w}}}=9 / 8$\ $\sin \mathrm{c}=\frac{1}{\mathrm{wn}_{\mathrm{g}}}=\frac{8}{9}$\