WAEC Physics 2025 Theory — Question 18
Question 18 of 34 from the West African Examinations Council (WAEC) Physics 2025 Theory paper, with the correct answer and a full explanation.
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10c(i) Two plane mirrors are inclined at an angle, β, to each other. An object placed between them formed 8 images. At what angle are the mirrors inclined?
Model answer
Number of images, N = 360/β − 1. 8 = 360/β − 1 → 9 = 360/β → β = 40°.
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