Physicshard · Past Paper
In a ray diagram for a concave mirror, a ray passing through the center of curvature:
APasses through focus
BBecomes parallel to principal axis
CRetraces its path
DBends at 90 degrees
✓ Correct Answer: C — Retraces its path
A ray passing through C hits the mirror normally (perpendicularly) and reflects back along the same line.
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