What is the angle of incidence when a ray of light undergoes total internal reflection?
A
Less than the critical angle
B
Equal to 90 degrees
C
Greater than the critical angle
D
Equal to 45 degrees
Correct Answer: Option C — Greater than the critical angle
Explanation:
Total internal reflection occurs when light travels from a denser to a rarer medium and the angle of incidence exceeds the critical angle causing all light to be reflected back.