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JAMB Physics 1979 Question 16

Question 16

Light and Reflection

An object is placed 30 cm from a concave mirror of focal length 15 cm. The linear magnification of the image produced is

  1. A.0
  2. B.²/₃
  3. C.1
  4. D.2
  5. E.3
Show the answer and explanation

Answer: C (1)

Explanation

The object is at the centre of curvature (2f = 30 cm), so the image is also at 30 cm. Magnification = v/u = 30/30 = 1.