An oil film floats on a water surface.The indices of refraction for water and oil,respectively,are 1.333 and 1.466.If a ray of light is incident on the air-to-oil surface at an angle of 40.0° with the normal,what is the incident angle at the oil-to-water surface?

Question

Quizplus · Accepted Answer

Using Snell's law at the air-to-oil interface, we find the angle of refraction in the oil. Then, applying Snell's law again at the oil-to-water interface, we calculate the incident angle at the oil-to-water surface, which is 26.0°.

An Oil Film Floats on a Water Surface