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Q.

Is it true that the paper burns when a concave mirror is held close in the sun towards a sheet of paper?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is true.
To burn the paper, the concave mirror should be moved so that the paper is positioned at the mirror's focus. As a result, all the sunlight converges into a particular point. Eventually, the paper catches fire.
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