Question

If two plane mirrors are inclined at an angle of 40°, number of images formed will be
(a) 7
(b) 8
(c) 9
(d) 5

Answer 1

Answer:

8

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Answer 2

Explanation:

When we simply use n=360/90 =4 we get an even number, but we should get an odd integer so we use other formula. So we get 3 images when the two mirrors are placed at 90 degree. This is how we can find number of images without drawing. So, a total of three images will be formed.