What is the term for the minimum angle at which total internal reflection occurs?
A
Angle of incidence
B
Critical angle
C
Angle of refraction
D
Angle of reflection
Correct Answer: Option B — Critical angle
Explanation:
The critical angle is the specific angle of incidence beyond which light traveling from a denser to a less dense medium is completely reflected internally rather than refracting out, a principle used in optical fibers.