A laser emits light of wavelength in air where its speed is

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Geometric Optics · Geometric Optics

Problem

A laser emits light of wavelength

500\,\text{nm}

in air where its speed is

3.0\times10^{8}\,\text{m\,s}^{-1}

. The light enters an oil in which its speed is

2.0\times10^{8}\,\text{m\,s}^{-1}

. What is the wavelength of the light in the oil? (a)

500\,\text{nm}

(b)

333\,\text{nm}

(c)

222\,\text{nm}

(d)

750\,\text{nm}