Two plane mirrors are inclined at an angle 20° to eac...
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.
17
18
19
20
Correct answer is A
The number of images formed = 360n where the value gotten is odd
else, = 360n−1.
Solving, we have that 36020=18
Hence, the no of images formed is 18 - 1 = 17.
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