Question

Explain the structure of a candle flame.

Answer 1

A candle flame has three main zones, they are

1. In the outer zone – complete combustion of the fuel takes place and the colour of the flame is blue and is the hottest part of the flame. It is the non-luminous part of the flame.
2. In the middle zone – partial combustions of the fuel take place and the colour of the flame is yellow and is a moderately hot part of the flame. It is the luminous part of the flame.
3. The inner zone – There are unburnt vapours of the fuel and the colour is black and is the least hot part.