Light waves of frequency $5.0\times {10}^{14}\mathrm{Hz}$ pass through a liquid in which the wavelength of light is found to be $4.5\times {10}^{-7}\mathrm{m}$. Find the velocity of light in the liquid.

Yellow light of wavelength $600 \mathrm{nm}$ is incident on a boundary separating air and glass. Find the speed, wavelength and frequency of reflected light. The refractive index of glass for yellow light is $1.5$.

Yellow light of wavelength $600 \mathrm{nm}$ is incident on a boundary separating air and glass. Find the speed, wavelength and frequency of refracted light. The refractive index of glass for yellow light is $1.5$.