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Two plans mirrors are inclined to each o...

Two plans mirrors are inclined to each other at some angle .A ray of light incident at `30^(@)`on one,after reflection form the other retraces its path .The angles between the mirrors is:
`30^(@) (2) 45^(@) (3) 60^(@) (4) 90^(@)`

Text Solution

Verified by Experts

The correct Answer is:
`30`

`/_i=/_r=30^(@)`
`:./_OIQ=60^(@)`
`:./_IOQ=90^(@)-60^(2)=30^(@)`
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Knowledge Check

  • Two plane mirror are inclined to each other at 90^(@) . A ray of light is incident on one mirror. The ray will undergo a total deviation of

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