Question

Write the expression for the number of images formed if an
object is placed in between two plane mirrors making an angle [3]
between them. State the condition, if any.​

Answer 1

Explanation:

The no. of images is equal to ( only when the no. of images formed is an odd number.) Here, the symbol alpha denotes the angle between the two mirrors.

$\frac{360}{ \alpha }$

When the no. of images are even , then we use the formula

$\frac{360}{ \alpha } - 1$

If the no. of images are in a decimal / fraction form , then it has to be rounded off to the nearest positive integer.

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