: why does a flame give off light?
In: Physics
Why does anything give off light?
The answer is that many things emit energy, especially things that are hot, and some of that energy can be released in the visible spectrum of light so we see it.
Fire gives off light both because it has hot material, bits of wood or coal or even gas that burns, and because electrons get excited and change energy stages. The electron part is hard to ELI5, but it’s part of what flames are, and the process emits energy as light and heat.
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