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Standard VII
Physics
Reflection of Light
Question

A plane mirror is placed vertically facing due north. An arrow pointing north-east is kept in front of the mirror. In which direction will the arrow point in this image ?

A
north-east
B
south-east
C
south-west
D
north-west
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Solution
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Correct option is B. south-east
The arrow pointing north-east will have be resultant of two directions-north and east. The horizontal component of arrow facing east will be same on reflection. But the vertical component of arrow facing the plane mirror will be reflected and be reversed. Thus, the image will have an arrow resultant of south-east direction.

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