How do we calculate the number of images formed by a pair of plane mirrors ? What will be the number of images if not calculated is a fraction? Calculate the number of images formed if the angle between the mirrors is 1) 50° 2) 72°.
We can find the number of images formed if we know the angle between the plane mirrors.
This is given by formula:
n= (360/ ϴ) - 1 if 360 /ϴ is even
n= 360/ ϴ if it comes odds
1)if the angle is 50 Number of images=(360/50)-1=7.2
We take 7 as image will not be taken as fraction.
2)if the angle is 72 Number of images=(360/72)=5 (No -1 since it is odd)