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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 mirrors are inclined at an angle theta as shown in the diagram. Light ray is incident parallel to one of the mirrors. The ray will start retracting its path after third reflection if :

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    B
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