What is the corresponding temperature of various colors of flame?

The temperatures of various colors are: red orange (3000 degrees), yellow white (4000 degrees), cyan (5000~6000 degrees) and purple (above 7000 degrees).

There are two factors that determine the color of the flame:

First, the temperature of the flame determines the color of the flame. When the temperature is low, it is infrared. With the increase of temperature, the color of flame is constantly changing. From the point of view of high-energy physics, the flames in infrared and color spectra are low-energy flames. With the increasing temperature, the color of the flame ranges from ultraviolet rays to X rays to gamma rays. These are indescribable "colors".

Secondly, the elemental composition of gaseous and plasma substances determines the natural spectrum of the flame. Each element in the element list will emit its own specific light color at high temperature. For example, sodium appears yellow, potassium is purple, copper is green, and the light color of the compound is variegated.

Extended data

Flame composition: flame core, inner flame and outer flame, and the flame temperature rises from inside to outside in turn.

1, flame center. The dark part and the blue part of the center are composed of gases that can burn but have not yet burned. Velocity of flame core particles

Low, the spectrum is concentrated in the infrared region and the temperature is low.

2. Internal flame. The brightest part around the flame core is the part where the gas is not completely burned. Contains carbon particles, which give off strong light when heated, including

Reduction, also known as reducing flame. The inner flame particles move at a medium speed, and the spectrum is concentrated in the visible part, with the highest brightness and lower temperature.

Tall man.

3. External flame. The outermost yellowish or transparent area is called the reaction zone. This is the part where the gas burns completely. Empty because of excessive and intense heat.

Gas is oxidizing, also known as oxidation flame. The outer flame particles have the fastest movement speed, the spectrum is concentrated in the ultraviolet region, the temperature is the highest, and the brightness is relatively high.

Tall man.

References:

Baidu encyclopedia-flame

References:

Baidu encyclopedia-flame temperature