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Q.

Two plane mirrors are placed perpendicular to each other. A ray strikes one mirror and after reflection falls on the second mirror. The ray after reflection from the second mirror will be

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a

Perpendicular to the original way

b

Anti perpendicular to the original way

c

Can be at any angle to the original ray

d

At 45°  to the original rays

answer is B.

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Detailed Solution

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d= 360-2θ     =360-2(90)        =180    

 

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