Two plane mirrors are inclined to each other su... - WAEC Physics 2018 Question
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°
B
45°
C
60°
D
90°
correct option: a
Number of images = \(\frac{360}{n} - 1\)
where n is the angle of inclination.
Given the number of images = 11, we have
\(\frac{360}{n} - 1 = 11\)
\(\frac{360}{n} = 12\)
\(n = \frac{360}{12} =30°\)
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