How many images of an object will be formed when the object is placed between two plane mirrors which are inclined at the following angles to one another?

(a) 120°

(b) 45°

(c) 180°

(d) 60°

(e) 90°

The formula to calculate the no. of images of an object placed between 2 plane mirrors- (360/θ)−1; where theta is the angle of inclination.

a- 2 (360/120)-1= 3-1 =2

b- 7 (360/45)-1= 8-1 =7

c- 1 (360/180)-1= 2-1 =1

d- 5 (360/60)-1= 6-1 =5

e- 3 (360/90)-1= 4-1 =3

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