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Question
Total internal reflection is defined as the complete reflection of light back into an optically denser medium when:
Options
light travels along the interface between two media of equal density
light travels from a denser medium to a rarer medium and the angle of incidence is less than the critical angle
light travels from a rarer medium to a denser medium and the angle of incidence exceeds the critical angle
light travels from a denser medium to a rarer medium and the angle of incidence exceeds the critical angle
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Solution
Total internal reflection occurs when light travels from an optically denser medium to an optically rarer medium and the angle of incidence becomes greater than the critical angle. The light is then completely reflected back into the denser medium.
