White light is incident on the interface of glass and air as shown in the figure. If green light is

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

Professor PC Thomas Classes · Answer

Critical angle $	heta_c$ increases with wavelength ($\lambda$). Red, orange, and yellow have longer wavelengths than green, so their critical angles are larger. If green is just totally reflected, colors with larger $\lambda$ (red, orange, yellow) will have $	heta_c > 	theta_i$ and will be refracted out into the air. Correct Option is A.