JAMB - Physics (2017 - No. 38)
When two mirrors are placed at an angle of 90º to each other, how many images will be formed when an object is placed in front of the mirrors
5
4
3
2
ব্যাখ্যা
When two mirror are inclined at an angle θ, the number of images formed, n = \(\frac{360}{\theta}\) − 1
∴ since \(\theta\) = 90o
∴ \(\frac{360}{\theta}\) − 1
= 4 − 1
= 3
∴ since \(\theta\) = 90o
∴ \(\frac{360}{\theta}\) − 1
= 4 − 1
= 3