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Two mirrors are inclined at angle theta...

Two mirrors are inclined at angle `theta` as shown in figure. Light rays are incident parallel to one of mirrors. Light will start retracing its path after the reflection if

A

`theta = 45^(@)`

B

`theta = 30^(@)`

C

`theta = 60^(@)`

D

all three

Text Solution

Verified by Experts

The correct Answer is:
B

`DeltaOAB implies theta + theta + 90 + theta = 180^(@), implies theta= 30^(@)`
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Knowledge Check

  • Two plane mirrors M_(1) and M_(2) are inclined at angle as shown in Figure . A ray of light1, which is parallel to M_(1) , strike M_(2) and after two reflections, ray 2 becomes parallel to M_(2) . Find the angle theta .

    A
    `0^(@)`
    B
    `30^(@)`
    C
    `45^(@)`
    D
    `60^(@)`

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