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JAMB Physics 2014 Question 29

Question 29

Light and Reflection

An object is placed 10 m from a pinhole camera of length 25 cm. Calculate the linear magnification

  1. A.2.5 × 10−2.
  2. B.2.5 × 10−1.
  3. C.2.5 × 101.
  4. D.2.5 × 102.
Show the answer and explanation

Answer: A (2.5 × 10−2.)

Explanation

Magnification = image distance ÷ object distance = 0.25 m ÷ 10 m = 2.5 × 10−2.