The critical angle for a transparent material is the angle at and beyond which all light within the material is
A)refracted.
B)reflected.
C)absorbed.
D)dispersed.
E)diffused.

Question

Quizplus · Accepted Answer

When light passes through a transparent material, it undergoes refraction. However, there is a certain angle of incidence beyond which the light is fully reflected back into the material, and none of it escapes. This angle is known as the critical angle. Therefore, beyond the critical angle, all the light is reflected and none of it is refracted, absorbed, dispersed, or diffused. Hence, the correct answer is B)reflected.

The Critical Angle for a Transparent Material Is the Angle