Question

why the top of the fire is orange and at the bottom in blue ?​

Answer 1

$\huge\bf{AnswEr -}$

The bright orange of most wood flames is due to the presence of sodium, which, when heated, emits light strongly in the orange. The blue in wood flames comes from carbon and hydrogen, which emit in the blue and violet.

Answer 2

Answer:

Instead, the colors of flames in a wood fire are due to different substances in the flames. The bright orange of most wood flames is due to the presence of sodium, which, when heated, emits light strongly in the orange. The blue in wood flames comes from carbon and hydrogen, which emit in the blue and violet.