WAEC Physics 2018 Objective — Question 23
Question 23 of 50 from the West African Examinations Council (WAEC) Physics 2018 Objective paper, with the correct answer and a full explanation.
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Two plane mirrors are inclined to each other such that an object placed between them has 11 images. Determine the angle of inclination
- A. 30°Correct
- B. 45°
- C. 60°
- D. 90°
Explanation
Number of images n = (360/θ)−1. Setting 11=(360/θ)−1 gives θ=360/12=30°.
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