A ray of light travelling in air strikes the glass surface at an angle of incidence ${60}^{\circ }$. Find the angle of refraction in glass if refractive index of glass is $\frac{3}{2}$? (given $sin{60}^{\circ }=\frac{\sqrt{3}}{2}$ and $sin{35}^{\circ }=\frac{1}{\sqrt{3}}$)

Q. A ray of light travelling inside a rectangular glass block of refractive index $\sqrt{2}$ is incident on the glass-air surface at an angle o incidence of ${45}^o$.The refractive index of air is one. Under these conditions the ray will

Q. A ray of light travelling inside a rectangular glass block of refractive index $\sqrt{2}$ is incident on the glass-air surface at an angle of incidence of ${45}^{}$. Show that the ray will emerge into the air at an angle of refraction equal to ${90}^{}$.

Q. Define Snell's law of refraction. A ray of light is incident on a glass slab at an angle of incidence of 60°. If the angle of refraction be 32.7°, calculate the refractive index of glass. (Given : sin 60° = 0.866, and sin 32.7° = 0.540).

Q. A ray of light is incident on a glass slab making an angle of ${60}^{\circ }$ with the surface. Calculate the angle of refraction in glass and the velocity of light in glass if the refractive index of glass and the velocity of light in air are $1.5$ and $3\times {10}^{8}m/s$ respectively