PH-462
Total internal reflection
Physics · Secondary 3 · Hard · Total internal reflection
A light ray in water (refractive index ) is incident on the water–air boundary at an angle of incidence of . The critical angle for water–air is . What happens to the ray at the boundary?
- It refracts into the air, bending towards the normal.
- It refracts into the air, bending away from the normal.
- It is totally internally reflected back into the water.
- It is partially reflected and partially absorbed in the water.
Sign in to check your answer and see the hint and the worked explanation. Free on PrepLab High.