Question

A piece of ice has a refractive index 1.309. A light of wavelength 5890Aº passes through it. What is it's wavelength and frequency in ice ?​

Answer 1

Answer:

Wavelength in medium

The refractive index can be seen as the factor by which the speed and the wavelength of the radiation are reduced with respect to their vacuum values: the speed of light in a medium is v = c/n, and similarly the wavelength in that medium is λ = λ0/n, where λ0 is the wavelength of that light in vacuum.