**1.** If an object is kept between two plane mirrors inclined at an angle θ, multiple images (N) are formed due to multiple reflections from both the mirrors.

**2. **The number of images can be calculated using formula n = \(\frac{360}{\theta}\)

**3.** Exact number of images seen (N) depends upon the angle between the mirrors and position of the object.

**4.** When n is an even integer, for all positions of the object the number of images formed are N = n – 1.

**5. When n is an odd integer:**

**a. For an object placed at the angle bisector of the mirrors:** N = n - 1

**b. For an object placed off the angle bisector of the mirrors:** N = n

**6.** If n is not an integer, N = m, where m is integral part of n.