A Bunsen burner is a small laboratory heat source consisting of vertical metal tube connected to a gas source. A Bunsen burner is able to produce a very hot flame from a mixture of gas and air. The air is let in through adjustable holes at the base of the vertical metal tube.
The Bunsen burner is the most widely used source of heat in the laboratory thes because of its ability to produce a hot non luminous flame of temperature of up to 1000C.
How the Bunsen burner works
Gas enters the burner through a tube connected to a jet inside the base. Air enter the Bunsen burner through the air hole at the base, the amount of air coming it can be variety by turning the collar at the top of barrel, the mixture of gas and burn.
When the air hole closed there is less oxygen and the flame is luminous with wavy and yellow. This luminous flame is called a safety flame because it is easy seen and so is less likely to cause accident.
When they are party open, there is more oxygen and the flame is medium and this flame is difficult to see. This type of lame can cause accident in the laboratory since one may not be aware that the burner is on.
When the holes are fully open, there is enough oxygen and the flame is non luminous which is the best for uses in laboratory experiment.