A monochromatic light beam of frequency crosses from air into a transparent material…

PHYSICS · Subjective · A Level · Physics · Waves · Waves

Problem

A monochromatic light beam of frequency

6.0\times10^{14}\,\text{Hz}

crosses from air into a transparent material where its wavelength is measured to be

300\,\text{nm}

. What is the refractive index of the material?