Q. When a ray of light emerges from a block of glass, the critical angle is
A) Equal to the angle of reflection
B) The angle between the refracted ray and the normal
C) The angle of incidence for which the refracted ray travels along the glass-air boundary
D) The angle of incidence
Explanation
The correct answer is Option C: The angle of incidence for which the refracted ray travels along the glass-air boundary.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.