Question

explain dark zone and luminous zone ​

Answer 1

dark zone is the zone which has dark colour and where bead formation takes place. it is the coolest part of the flame. it is blue in colour.

luminous zone is the middle part of the flame. it is the zone of partial combustion. it is yellow in colour.

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Answer 2

Explanation:

DARK ZONE: This zone is the outermost layer of the flame. It is the part of flame occurring around the wick of the candle. It mostly contains all the unburnt wax. So when the candle is lit up the unburnt vapours move away upward from the wick.

LUMINOUS ZONE: The middle zone also known as luminous zone is the zone which is moderately hot with limited oxygen supply. Hence, the fuel vapours burn partially and produce carbon particles. These particles then leave the flame as smoke and soot. This zone is the major part of the flame.

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