Why tungsten wire will glow?
Like the burning of the red iron can be issued as light. The higher the temperature of the filament, the brighter the light emitted. It is called incandescent lamp. As the incandescent light glows, a lot of electricity will turn into heat, and only a small fraction (possibly less than 1%, no) can be converted into useful light.
How the incandescent lamp works: the current through the filament (tungsten wire, melting point of more than 3000 degrees Celsius) to produce heat, spiral filament will continue to heat accumulation, making the filament temperature of 2000 degrees Celsius above the filament in an incandescent state
A lot of material can be lit after the power, tungsten can, tungsten light long life, so use it as a light
The life of an incandescent lamp is related to the temperature of the filament, since the higher the temperature, the easier it is to light the filament
Incandescent light is full-color light, but the composition of various shades of light from the luminous material (tungsten) and the temperature of the decision. The proportion of imbalance caused the color of light color, so the color of the object under the incandescent lamp is not real.
