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Two plane mirror M(1) "and" M(2) are inc...

Two plane mirror `M_(1) "and" M_(2)` are inclined to each other at `70^(@)`. A ray incident on the mirror `M_(1)` at an angle `theta` fallls on `M_(2)` and is then reflected parallel to `M_(1)` for

A

`theta= 45^(@)`

B

`theta= 50^(@)`

C

`theta= 55^(@)`

D

`theta=60^(@)`

Text Solution

Verified by Experts

The correct Answer is:
B

`90^(@) - theta = 180^(@)- 70^(@)- 70^(@) implies theta = - 50^(@)`
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Knowledge Check

  • Two blocks M_(1) and M_(2) having equal mass are free to move on a horizontal frictionless surface . M_(2) is attached to a massless spring as shown in figure .Intially M_(2) is at rest and M_(1) is moving toward M_(2) with speed v and collides head - on with M_(2) .

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