Question

a ray of light is travelling from air to water what is the angle of incidence in air if angle of refraction in water is 41 take refractive index of water = 1.32

Answer 1

Dear Student,

$$\begin{gathered} \mathrm{According}\mathrm{to}\mathrm{snell}\text{'}\mathrm{s}\mathrm{law}, \\ \mathrm{\mu }=\frac{\sin \mathrm{i}}{\sin \mathrm{r}} \\ 1.32=\frac{\sin \mathrm{i}}{\sin 41°} \\ \sin \mathrm{i}=1.32\times 0.65=0.858 \\ \mathrm{i}={\sin }^{-1}\left(0.858\right) \\ \mathrm{i}=59.09° \end{gathered}$$