How many images of an object will be formed when the object is pl… - Vidyadip

Question

How many images of an object will be formed when the object is placed between two plane mirrors which are inclined at the following angles to one another?

120°
45°
180°
60°
90°

✓

Answer

The formula to calculate the no. of images of an object placed between 2 plane mirrors $\Big(\frac{360}{\theta}\Big)-1$ where theta is the angle of inclination.$2\Big(\frac{360}{120}\Big)-1=3-1=2$
$7\Big(\frac{360}{45}\Big)-1=8-1=7$
$1\Big(\frac{360}{180}\Big)-1=2-1=1$
$5\Big(\frac{360}{60}\Big)-1=6-1=5$
$3\Big(\frac{360}{90}\Big)-1=4-1=3$

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