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What does the law of reflection say about the angle of reflection and the angle of incidence, both measured from the normal?
AThe angle of reflection is always double the angle of incidence
BThe angle of reflection equals the angle of incidence
CThe angle of reflection is always the complement of the angle of incidence
DThe angle of reflection is always zero, regardless of incidence
Answer & Solution
Correct answer: B. The angle of reflection equals the angle of incidence
1. The law of reflection states that the angle of reflection equals the angle of incidence.
2. Both angles are measured from the normal, the line perpendicular to the surface at the point of contact.
3. Doubling or taking the complement of the incident angle are both different relationships, not the one the law states.
_Source: OpenStax Physics (CC BY 4.0), Ch 16 "Mirrors and Lenses", section 16.1 Reflection_
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