How does fire emit light (the sun, a candle, a fire, etc.)?

Question

How does fire emit light (the sun, a candle, a fire, etc.)?

In: Physics

Answer 1

When you put energy into an atom the electrons move farther away from the nucleus, but they want to go back to normal. To do that they need to get rid of that energy. Electrons get rid of that energy as electromagnet radiation. Depending on the strength it comes out as heat, radio signals, or light.

Edit: the light receptors in your eyes response to certain types of these waves which become photons and trigger the nerves to send signals to your brain.