1 What is fire?
What is the Color of Each PlanetWhat comes to your mind when we talk about fire; is it campfire, bonfire, heat or temperature, or anything else?
Fire is a type of chemical reaction occurring with the visible effect of the process of combustion. Combustion happens when fuel reacts with oxygen to release heat. Fire takes existence only between the fuel and oxygen present in the air.
2 The three significant elements of fire
Three significant elements of fire include heat, oxygen, and fuel. Without any of them, the fire triangle is incomplete and will not occur. Adding up the 4th element, that is the chemical reaction, you will actually have a fire tetrahedron. In case of absence in any of these four elements will allow the fire to be extinguished.
3 What are the visible colours produced by fire?
The visible light spectrum itself includes radiation seen by the human eye as VIBGYOR that is violet, indigo, blue, green, yellow, orange, and red. The radiations in the visible light spectrum consist of (4.4 × 107 to 7 × 107 m). All these colours are carried over in all sorts of fire, although with incomplete precision.
4 What causes the colours in flames?
Even the colour of stars signify their temperatures; for instance, red Aldebaran is hotter than the blue-white Vega. You will observe a sort of radiation in metal heated to red, orange, or white heat.
The orange colour is more visible while the wooden logs are burning, and the fire is in the heart of logs. The orange colour is produced because of the presence of sodium which emits strong light when heated. The bluish colour emerges because of the presence of carbon and hydrogen particles, that sometimes also lead to emitting the violet tone of flames. While lithium makes the flame to be red, and the copper compound makes it green.
5 How are the visible colours produced?
Electromagnetic radiation plays a significant role to produce an array of colours in the light. It allows the light to occupy only a small fraction of the entire EM spectrum. A wavelength and a frequency characterize EM:
The product of wavelength and frequency of electromagnetic radiation is always the speed of light, where wavelength depicts the distance between corresponding points along with a graphed EM wave, and the frequency represents the number of wavelengths per second passing a fixed point.
6 What is the temperature of fire?
It is imperative to know the range of the temperatures produced in all sorts of fires. The small flames; you can think of a burning candle, burns at close to 1400°C while the core of the flame burns at 800°C. For the walls of household ovens, the temperature can reach circa 500°C that means the broiling or baking temperature reaches more or less half of that present in the walls.
A bonfire stroked with wood and charcoal can reach up to 1100°C, whereas a household fireplace can cause the flames to reach about 600°C.
For your information- The sun’s inner temperature is 20,00,000°C that makes all these makes all these values frivolous.
7 Flame colour temperature chart
Flame colour temperature chart* Dark red (first visible glow): 500 to 600 °C (900 to 1,100°F)
* Dull red: 600 to 800 °C (1,100 to 1,650°F)
* Bright cherry red: 800 to 1,000 °C (1,650 to 1,800°F)
* Orange: 1,000 to 1,200 °C (1,800 to 2,100°F)
* Bright yellow: 1,200 to 1,400 °C (2,100 to 2,500°F)
* White: 1,400 to 1,600 °C (2,500 to 2,900°F)