Question

Match the number of images formed by two plane mirrors with the corresponding angle between them.

• A. 5
• B. 2
• C. 3
• D. 1

Answer 1

When two plane mirrors are placed at some angle, multiple images of an object are formed.
The number of images formed is given by the formula N $=\left(\frac{360}{\theta }\right)-1$; where $\theta$ is the angle between the plane mirrors in degrees. Therefore, when
$for\theta =60,N=\left(\frac{360}{60}\right)-1=5for\theta =120,N=\left(\frac{360}{120}\right)-1=2for\theta =90,N=\left(\frac{360}{90}\right)-1=3for\theta =180,N=\left(\frac{360}{180}\right)-1=1$