Question

Why is middle part of
the candle flame is luminous

Answer 1

Answer:

luminous zone

Explanation:

The yellow colour region which is the bright part of the flame is the middle zone. It is moderately hot and partial combustion of fuel takes place. The least hot region of the flame is present innermost. This inner zone is black due to the presence of unburnt wax vapours.

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Answer 2

It is luminous because there is most oxygen in the middle