Question

why a concave mirror burns a paper using sunlight? Can it be done by a convex mirror? Why or Why not? Explain.
This Is A Question From Optical Physics Science Branch.
Class VII
Chapter 15 - Light
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Answer 1

Simple the concave mirror Burns a paper because it has ability to converse / focus all the sunrays at a point .So it burnes the paper .

Answer 2

Because concave mirror acts as converging mirror n converge all the rays at focus which increases the temperature at focus causing paper to burn..
Convex mirror can't b used for this..