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How can electromagnetic waves be used to start a forest fire?

User ZKS
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2 Answers

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You could use a magnifying lens to focus some infrared waves from the sun into a small, very hot point, ignite some leaves, and then get out of there fast.
User Seberg
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Electromagnetic waves emt energy, and energy can be light and or heat, thus fire
User Gerardo Bautista
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