Question

10. To get 9 multiple images the angle between the plane
mirrors should be:
(A) 60
(B) 36°
(C) 50°
(D) 90°​

Answer 1

Answer:  ⇒ 36°

Explanation :

• The number of images formed between two plane mirrors inclined at an angle θ to each other is given by formula, n = (360/θ) - 1.

• case 1 : when (360/θ) is an even integer then number of image formed , n = (360/θ) - 1.
• case 2 : if (360/θ) is an odd integer and object is kept symmetrically.