LIGHTING EFFECT OF ELECTRIC CURRENT

 LIGHTING EFFECT OF ELECTRIC CURRENT

When electric current passed through the filament of the bulb due to heating effect bulb glows

The space inside the bulb filled with inert gases or vaccum to save the filament from oxidation on heating

In electric bulbs most of the electrical energy wasted in heating effect

FLUORESCENT TUBE:

In fluorescent tube  inside walls of the tube coated with fluorescent material called phosphorus

Fluorescent tubes are filled with a low pressure mercury vapour gas

The Gas emits ultraviolet rays which strikes the phosphorus and gives the light

In fluorescent tube metalic wires is not used and there is no loss of energy in heating effect

Compact fluorescent lights (CFL) are a modification of fluorescent tube 

CFL emits more light consumes less energy