Question

if you are asked to burn paper using a mirror, how will you do it ? which mirror will you use ?

Answer 1

I will take a piece of a paper and a mirror and go to the terrace then I point the mirror to the sun and a paper below the mirror when the sun rays pass through the mirror it will burn the paper.
I will use concave mirror because when the parallel rays Passed through concave mirror all the parallel rays meet at a point.

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Answer 2

Explanation:

I will take a concave mirror and at the focus I will allow the sun rays ☀️ so that the papy can burn easily

EXTRA : in ancient times people used to burn the ships by using a big concave mirror