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A point object is placed midway between ...

A point object is placed midway between two plane mirrors a distance apart. The plane mirrors form an infinite number of images due to multiple reflections. The distance between `n^(th)` order images formed in the two mirrors is

A

`na`

B

`2 na`

C

`na//2`

D

`n a`

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The correct Answer is:
b
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