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  4. A bulb is placed between two plane mirrors inclined at an angle of 60° . The number of images formed is

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Q. A bulb is placed between two plane mirrors inclined at an angle of $ 60{}^\circ $ . The number of images formed is

JamiaJamia 2009

Solution:

As $ \frac{360{}^\circ }{\theta }=\frac{360{}^\circ }{60{}^\circ }=6 $ Which is even $ \therefore $ $ n=\frac{360{}^\circ }{\theta }-1=6-1=5 $