Physics - Geometrical Optics Question with Solution | TestHub

Given, wavelength of light, $\lambda =546\mathrm{nm}$ Refractive ve index, $\mu =1.5$ Speed of light, $c=3\times 10^6{\mathrm{ms}}^{-1}$ Refractive index, $\begin{array}{rl}\mu & =\frac{\text{ Speed of light in vacuum (c) }}{\text{ Speed of light in glass (v) }}\\ & =\frac{c}{v}\\ & =\frac{v\lambda }{v{\lambda }_g}\left[{\lambda }_g=\text{ wavelength of light in glass }\right]\\ \mu & =\frac{\lambda }{{\lambda }_g}\Rightarrow {\lambda }_g=\frac{\lambda }{\mu }\\ & =\frac{546}{1.5}=364\mathrm{nm}\end{array}$