Question

degree of candle zone​

Answer 1

The outermost zone: The outermost zone also known as non-luminous zone is the zone of complete combustion. The ample presence of oxygen (or air) aids in complete combustion. It is the hottest zone of the candle flame and does not produce much light. It is blue in colour.

Answer 2

Temperature is around 1,200 °C (2,190 °F). Zone V - The non-luminous outer zone or veil surrounds Zone IV. Here the flame is at its hottest, at around 1,400 °C (2,550 °F), and complete combustion occurs. It is light blue in color though most of it is invisible.