Physics

Problem

A monochromatic light beam of frequency

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

enters glass whose refractive index is

1.5

. The wavelength of the beam inside the glass is a)

9.0\times10^{-7}\,\text{m}

2.7\times10^{-7}\,\text{m}

4.0\times10^{-7}\,\text{m}

6.0\times10^{-7}\,\text{m}