The color of the flame is determined by the burning substance and its temperature. Under standard atmospheric conditions, most organic matter and certain minerals produce an orange flame when burned. This is because when the temperature of the flame is high enough, the gas molecules in the flame absorb a specific wavelength of light, which is mainly located in the blue and purple regions of the spectrum. When these gas molecules release energy, they emit red and orange light, so the flame we see is orange. In addition, the burning substance can also affect the color of the flame. For example, when oil is burned, the color of the flame is usually orange; And when the wood burns, the color of the flame is yellow. This is because the gases and heat produced by different substances when they are burned are different, and these factors affect the color of the flame.
In addition to the burning substance and temperature, there are other factors that can also affect the color of the flame. For example, when there is enough oxygen**, the flame will be brighter; When oxygen is insufficient**, the color of the flame becomes dull. In addition, certain substances produce special color effects when burned, such as sodium emits a bright yellow flame when burned, and copper emits a green flame when burned.
In conclusion, the color of the flame is determined by a combination of the burning substance, temperature, and other factors. While the combustion of different substances produces different colors, most organic matter produces an orange flame when burned. This is because orange light has a higher energy in the visible spectrum and is easily perceived by our eyes.