you can use a concave mirror to start a fire using sun's rays but not a convex mirror
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Explanation:
On a sunny day, you can use the sun's rays and a concave mirror to start a fire. ... The concave mirror has a real focal point. So, whenever a parallel beam of light rays has a point of incidence on the concave mirror, then all the rays will meet at the focal point
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Answer:
This cannot be done by using a convex mirror since the sun ray's will diverge after reflection.
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