Physics JAMB

When two mirrors are placed at an angle of 90° to each other; how many images will be formed when an object is placed in front of the mirrors?

A. 5
B. 4
C. 3
D. 2

Correct Answer:

Option C – 3

Explanation

When two mirrors are inclined at an angle θ, the number of images formed, n = 360/θ − 1

∴ since θ = 90°

∴ 360/θ − 1

= 4 − 1 = 3

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