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Question

Which mirror is used to burn a paper?

A
Convex mirror
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B
Concave mirror
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C
Plane mirror
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D
All of the above.
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Solution

The correct option is B Concave mirror
A concave mirror converges all the light rays coming parallel to principal axis at its focus. When you keep a paper at the focus of the mirror, it starts burning due to rise in temperature at that point.

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