Question

what is flame........​

Answer 1

an area of bright burning gas that comes from something that is on fire

लपट, ज्‍वाला

Answer 2

$\huge {\bf{\red{Flame}}}$

When we light a matchstick and a candle, both produce yellow flame. When kerosene is burnt in a lamp, its flame is yellow and smoky, but when burnt in a stove, the flame is blue and smokeless. The flame produced by burning LPG is blue and smokeless.

A flame is the shining zone in which a undergoes combustible gaseous material combustion producing heat and light.

All gaseous substances burn with a flame. Liquid combustible fuels also burn with a flame. Solid combustible substances when burnt at low temperature do not give a flame. At higher temperatures, however, when solid combustible materials vaporise, they also burn with a flame. Thus only those solid and liquid fuels which vaporise on heating burn with a flame. For example, kerosene, a liquid fuel and wax, a solid fuel both vaporise on heating to burn with a flame.

The actual nature of the flame, e.g. colour, etc. depends upon the chemical nature of the combustible material. The shape of the flame depends upon the apparatus used for burning of the combustible material. A flame can be classified into two types: luminous flame and non-luminous flame.

A yellow flame which produces heat and appreciable amount of light is called a luminous flame. A luminous flame obtained when a fuel undergoes partial (or incomplete) combustion because of insufficient supply of air (or oxygen).

A blue flame which produces more heat and very little light is called non-luminous flame. A non-luminous flame is obtained when a fuel undergoes complete combustion because of sufficient supply of air (or oxygen).