Question

White light is incident on the interface of glass and air as shown in the figure. If green light is just totally internally reflected then the emerging ray in air contains :

• A. yellow, orange, red
• B. violet, indigo, blue
• C. all colours
• D. all colours except green

Answer 1

Answer: (A)

All the wavelengths below green's wavelength will either undergo total internal reflection or get absorbed by the material. Hence only the wavelengths higher that green wavelength will emerge out. i.e., yellow, orange and red.