A person holds a concave mirror and directs its reflecting surface towards the Sun. The reflected sunlight is focused onto a sheet of paper until a sharp, bright spot is formed. What will happen if the paper is kept at this position for some time?

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Physics · Light and Optics

Verified Solution4 OptionsUpdated: October 2026👁️1 View

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Correct answer

The paper will catch fire and burn, producing smoke

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Answer 1

The paper will only crumple due to expansion

Answer 2

The paper will instantly turn into liquid ash

Answer 3

The paper will catch fire and burn, producing smoke

Answer 4

Nothing will happen to the paper

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