Two plane mirrors are inclined at an angle 20° to each other. Determine the number of images formed when an object is placed between them.
The number of images formed = \(\frac{360}{n}\) where the value gotten is odd
else, = \(\frac{360}{n} -1\).
Solving, we have that \(\frac{360}{20} = 18\)
Hence, the no of images formed is 18 - 1 = 17.
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