The zone that produces light in a candle flame is called
(a) Make a labelled diagram of a candle flame:
(b) What makes the middle zone of a candle flame luminous (or light-giving) ?
The middle zone of a candle flame is also called the zone of ______ combustion.
In a candle flame, what is the colour of : (a) innermost zone (b) middle zone, and (c) outer zone ?