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software of the retardant chemical which include Halon (mainly banned in certain nations around the world as of 2023[update]) into the flame, which retards the chemical response alone until eventually the speed of combustion is just too sluggish to maintain the chain reaction.

A candle's flame A flame is a mix of reacting gases and solids emitting obvious, infrared, and sometimes ultraviolet mild, the frequency spectrum of which is dependent upon the chemical composition with the burning product and intermediate reaction goods. In lots of situations, including the burning of natural and organic make any difference, for instance wood, or even the incomplete combustion of gas, incandescent sound particles named soot develop the common purple-orange glow of "fire". This light-weight contains a continual spectrum. Complete combustion of fuel has a dim blue color due to the emission of single-wavelength radiation from various electron transitions in the thrilled molecules formed in the flame.

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