Two plane mirrors are inclined to each other such that an...
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°
Correct answer is A
Formula for number of images = 360n−1
where n is the angle of inclination.
Given the number of images = 11, we have
360n−1=11
360n=12
n = \frac{360}{12} =30°