Answer to Question #52740 in Optics for Atooki Yunus
The critical angle for total internal reflection at an air-water interface is approximately 48o. In which of the following situations will total internal reflection occur?
light incident in water at 40o
light incident in water at 55o
light incident in air at 40o
light incident in air at 55o
For the total internal reflection to take place, the angle of incidence in the medium with higher refractive index should be greater than the critical angle. Therefore, the total internal reflection occur when light incident in water at 55 deg. Answer: light incident in water at 55 deg.