What is the term for the total internal reflection angle beyond which light cannot exit a medium?
A
Incident angle
B
Reflection angle
C
Refractive angle
D
Critical angle
Correct Answer: Option D — Critical angle
Explanation:
The critical angle is the angle of incidence beyond which light traveling from a denser to a rarer medium is completely internally reflected...
The critical angle is the angle of incidence beyond which light traveling from a denser to a rarer medium is completely internally reflected rather than refracted. This principle underlies technologies like optical fibers used in modern communication systems.