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bocchesegiacomo
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Why does combustion emit light?
For heat, for excited electrons or for other reasons?
For heat, for excited electrons or for other reasons?
It does not always. Recently there was an article on these forums where a member indicated that methanol flames are invisible. See post #7 by @Ranger Mike here: https://www.physicsforums.com/threads/decarbonizing-an-engine-with-water-myth-or-fact.793344/bocchesegiacomo said:Why does combustion emit light?
Combustion is a chemical reaction that occurs when a fuel combines with oxygen to produce heat, light, and various products such as carbon dioxide and water vapor.
Combustion emits light through a process called incandescence, where the high temperatures produced by the reaction cause the fuel particles to give off light. The color of the light emitted depends on the temperature and the type of fuel being burned.
Combustion emits light for several reasons. One is that the high temperatures produced during the reaction excite electrons in the fuel particles, causing them to release energy in the form of light. Another reason is that certain elements present in the fuel, such as sodium or potassium, have a natural tendency to produce light when burned.
The main benefit of combustion emitting light is that it provides a source of illumination, making it possible for us to see in the dark. Combustion also produces heat, which is essential for cooking, heating, and generating electricity. Additionally, the products of combustion, such as carbon dioxide and water vapor, are essential for sustaining life on Earth.
While combustion emitting light has many benefits, it also has some negative impacts. The burning of fossil fuels for light and heat releases carbon dioxide, a greenhouse gas that contributes to climate change. Combustion can also produce air pollutants, such as carbon monoxide and nitrogen oxides, which can harm human health and the environment. Therefore, it is essential to use combustion responsibly and find alternative, cleaner sources of energy.