 In the figure above, $AB$ is the incident ray, $BC$ is the reflected ray, and the normal is drawn at the point of incidence. If $\angle i$ is the angle of incidence and $\angle r$ is the angle of reflection, which relation always holds?
A$\angle i > \angle r$
B$\angle i < \angle r$
C$\angle i = \angle r$
DDepends on the surface
Answer & Solution
Correct answer: C. $\angle i = \angle r$
By the second law of reflection, the angle of incidence equals the angle of reflection (both measured from the normal). The first law puts both rays and the normal in the same plane.
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