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∘
(a) 120∘ = 2
(b) 45∘ = 7
(c) 180∘ = 1
(d) 60∘ = 5
(e) 90∘ = 3