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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.

A.

17

B.

18

C.

19

D.

20

Correct answer is A

The number of images formed = 360n where the value gotten is odd

else, = 360n1.

Solving, we have that 36020=18

Hence, the no of images formed is 18 - 1 = 17.