A figure is shown with three flat, horizontal layers. Thetop (white) is air, the middle (green) is material 2, and thebottom (blue) is material 3. A light ray comes in at the top leftof the figure. In air, the ray is θ1 from the vertical.In material 2, the ray is θ2 from thevertical.
A light ray in air is incident on a flat layer of material 2that has an index of refraction n2 = 1.5. Beneathmaterial 2 is material 3 with an index of refraction n3.The ray is incident on the air-material 2 interface at the Brewsterangle for that interface. The ray of light refracted into material3 happens to be incident on the material 2-material 3 interface atthe Brewster angle for that interface. What is the value ofn3?