Which of the following condition is necessary for the occurrence of total internal reflection of light?

Answer Details

Total internal reflection occurs when light travels from a denser medium to a less dense medium, such as from water to air or from glass to air, and the angle of incidence is greater than the critical angle. The critical angle is the angle of incidence that produces an angle of refraction of 90 degrees. Therefore, the correct option is: "the angle of incidence must be greater than the critical angle".