Physics

Problem

A soap bubble (index of refraction

n=1.33

) has a uniform thickness of

120\,\text{nm}

and is illuminated by white light at normal incidence in air. Which of the following wavelengths in air will be most strongly reflected? a)

480\,\text{nm}

640\,\text{nm}

320\,\text{nm}

720\,\text{nm}