Question

meaning of non luminous zone and luminous zone​

Answer 1

Answer:

non luminous zone

it is the outermost layer of a flame,it is blue in colour.

it also has sufficient supply of oxygen.

luminous zone

it is middle layer of a flame,it is moderately hot and is yellow in colour.

Answer 2

A flame is the visible gaseous part of a fire. It is a zone of combustion of gaseous substances accompanied by evolution of heat & light. All substances don not burn flame.  A candle flame is mostly consider to study the various zones of a flame.

1. Non luminous zone of candle flame - it is a zone of complete combustion, is the hottest part of the candle flame, it is the outermost zone of the flame
2. Luminous zone of candle flame - it is a zone of incomplete combustion is the moderately hot of the candle flame, it is the middle zone of the flame