WAEC Physics 2015 Objective — Question 32
Question 32 of 50 from the West African Examinations Council (WAEC) Physics 2015 Objective paper, with the correct answer and a full explanation.
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An object is placed 20 cm from a concave mirror of focal length 15 cm. Calculate the linear magnification of the image formed.
- A. 0.5
- B. 1.5
- C. 2.0
- D. 3.0Correct
Explanation
Using 1/v = 1/f − 1/u = 1/15 − 1/20 = 1/60, so v = 60 cm. Magnification = v/u = 60/20 = 3.0.
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