Why does the incandescent light go out when it turns out?
So that the bulb black, so incandescent are caused by "potbellied" appearance
Because at some temperature some of the tungsten atoms will evaporate into gas and deposited on the glass surface of the bulb
It is because the hot filament produced light radiation, only to make the light issued a bright light
In fact, a filamentous incandescent filament temperature up to 3000 ℃
Incandescent filament is made of tungsten wire, the most valuable feature of this material is its high melting point,
