What is the number of images of an object formed by two mirrors if the angle between the mirrors is in between 90 and 72?

(a) Angle between the mirrors, θ = 90o

Now, n = 360o / θo = 360o / 90o = 4, which is even.

Hence number of images formed will be (n-1); i.e., 4 - 1 = 3 images

(b) Angle between the mirrors, θ = 60o

Now, n = 360o / θo = 360o / 60o = 6, which is even.

Hence number of images formed will be (n-1); i.e., 6-1 = 5 images

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