S K Sharma Solutions for Chapter: Light Reflection and Refraction - Natural Phenomena, Exercise 2: UNSOLVED NUMERICALS FOR PRACTICE

A ray of light travelling in air strikes a glass slab at an angle of $30°$. Calculate the angle of refraction if the refractive index of glass is $1.5$.

A ray of light travelling in air strikes the water surface at an angle of $40°$. Calculate the refractive index of water if the angle of refraction is $29°$.  

The velocity of light in air is $3\times {10}^8 \mathrm{m} {\mathrm{s}}^{-1}$ and velocity of light in glass slab is $2\times {10}^8 {\mathrm{ms}}^{-1}$. Find the refractive index of glass.

Light enters from air into a diamond which has a refractive index of $2.42$. Calculate the speed of light in a diamond. The speed of light in air is $3.0\times {10}^8 \mathrm{m} {\mathrm{s}}^{-1}$.

Light enters from air into water which has a refractive index of $1.33$. Calculate the speed of light in water. The speed of light in air is $3.0\times {10}^8 \mathrm{m} {\mathrm{s}}^{-1}$.