If n_water = 1.50 and n_glass = 1.33, then total internal reflection at an interface between this glass and water: A) occurs whenever the light goes from glass to water B) occurs whenever the light goes from water to glass C) may occur when the light goes from glass to water D) may occur when the light goes from water to glass E) can never occur at this interface

Question

Quizplus · Accepted Answer

Total internal reflection occurs when the angle of incidence is greater than the critical angle, which is given by sin(theta_c) = n2/n1, where n1 and n2 are the refractive indices of the two mediums. In this case, n1 is water and n2 is glass. Using this formula, the critical angle for glass-water interface is approximately 61 degrees. Therefore, total internal reflection may occur when light goes from water to glass at angles of incidence greater than 61 degrees.

If Nwater = 1

If N_water = 1