alleryStart learning →A ray aimed at the centre of curvature of a concave mirror retraces its path because it
Atravels parallel to the axis
Bpasses first through the focus
Cstrikes the mirror along the normal
Dbounces off toward the pole
Answer & Solution
Correct answer: C. strikes the mirror along the normal
1. The normal at any point of a spherical mirror is the line joining that point to the centre of curvature C.
2. A ray aimed at C therefore hits along the normal, so the angle of incidence is zero.
3. With i = 0 the reflected ray retraces the same path.
_Source: AP/TS SCERT Class 10 Physical Science, "Reflection of Light at Curved Surfaces"_
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