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JAMB Physics 2013 Question 30

Question 30

Light and Reflection

A ray of light passing through the centre of curvature of a concave mirror is reflected by the mirror at

  1. A.0°.
  2. B.45°.
  3. C.90°.
  4. D.180°.
Show the answer and explanation

Answer: A (0°.)

Explanation

A ray through the centre of curvature travels along a radius, so it meets the mirror along the normal (angle of incidence 0°) and is reflected straight back at 0°.