A thin, transparent oil film ( ) covers the surface of still water ( ). A beam of…
PHYSICS · Multi-part · CBSE · Physics · Light — Reflection and Refraction · Light — Reflection and Refraction
Problem
A thin, transparent oil film (no=1.40) covers the surface of still water (nw=1.33). A beam of sunlight in the air is incident on the oil film at 25∘ to the normal.
(1) Calculate the angle of the beam inside the oil film.
(2) Calculate the angle of the beam in the water after it passes through the oil–water interface.