Physics

Problem

A beam of light has wavelength

600\,\text{nm}

in vacuum. It enters glass of refractive index

1.5

. Which statement is correct? a) The wavelength decreases to

400\,\text{nm}

and the frequency decreases. b) The wavelength increases to

900\,\text{nm}

and the frequency decreases. c) The wavelength decreases to

400\,\text{nm}

and the frequency remains the same. d) The wavelength decreases to

300\,\text{nm}

and the frequency remains the same.