The critical angle is the angle of incidence for which the angle of refraction is:
A
90 degrees
B
0 degrees
C
180 degrees
D
45 degrees
Correct Answer: Option A — 90 degrees
Explanation:
The critical angle is defined as the specific angle of incidence in a denser medium at which the refracted ray travels exactly along the bou...
The critical angle is defined as the specific angle of incidence in a denser medium at which the refracted ray travels exactly along the boundary, making the angle of refraction equal to 90 degrees.