Sure! Here is a labelled diagram of a candle flame along with a detailed explanation:

The Candle Flame

A candle flame is a visible light-emitting structure resulting from the combustion of wax. It consists of various zones with different temperatures and characteristics. Let's understand each part of the flame:

1. Wick:
The wick is the central part of the candle flame. It is made of a twisted bundle of fibers that draw the liquid wax upward through capillary action. The wick provides fuel for the flame by vaporizing the liquid wax.

2. Zone of Combustion:
The zone of combustion is the hottest part of the flame, located just above the tip of the wick. Here, the vaporized fuel combines with oxygen from the air and undergoes combustion, releasing heat energy. The temperature in this region can reach up to 1400 degrees Celsius.

3. Luminous Zone:
Above the zone of combustion is the luminous zone. It appears yellow and emits light due to incandescence. In this zone, the partially burnt fuel particles are heated to a high temperature but do not have enough oxygen to undergo complete combustion. These heated particles emit visible light, giving the flame its characteristic glow.

4. Non-luminous Zone:
The non-luminous zone surrounds the luminous zone. It is the outermost and coolest part of the flame. In this region, there is sufficient oxygen for complete combustion to occur. The fuel particles that have not yet been burnt rise to this zone and react with the available oxygen, releasing carbon dioxide and water vapor.

5. Blue Cone:
Just above the tip of the wick, there is a small, blue-colored cone-shaped region. This is the hottest part of the flame, where complete combustion takes place due to the presence of sufficient oxygen. The blue color is due to the emission of light by excited molecules and particles.

In summary, a candle flame consists of a wick, a zone of combustion, a luminous zone, a non-luminous zone, and a blue cone. Each zone has different characteristics and temperatures, contributing to the overall appearance and properties of the flame.