WAEC - Physics (2018 - No. 23)
Two plane mirrors are inclined to each other such that an object placed between them has 11 images. Determine the angle of inclination
30°
45°
60°
90°
Explanation
Formula for number of images = \(\frac{360}{n} - 1\)
where n is the angle of inclination.
Given the number of images = 11, we have
\(\frac{360}{n} - 1 = 11\)
\(\frac{360}{n} = 12\)
\(n = \frac{360}{12} =30°\)
Comments (0)
