|Combustion and Flame (Science)||Close X|
Only those substances, which vaporize during burning, produce flames. For example, when a candle burns, molten wax rises through the wick, and gets vaporized to form flames. On the other hand, charcoal does not vaporize on burning. Hence, it does not produce a flame. The flames of kerosene lamp, candle, and Bunsen burner are shown in the figure below.
Can you observe the difference between the flames of a candle and Bunsen burner?
It will be noticed that the flame from the Bunsen burner is blue in colour while that of the candle is primarily yellow in colour.
Do you know the significance of these colours in the flame?
Each colour in a flame represents a different zone of the flame.The different zones present in a candle flame are as follows.
Middle zone or the luminous zone
Outer zone or the non-luminous zone