What shape of incandescent lamp
Over time, the light bulb will turn black, reduce the brightness, affect the lighting.
And the bulb is made into a pear-shaped shape. Thus, when the inert gas convection in the bulb, the metal tungsten vaporized black particles are mostly rolled up by the gas
Scientists are based on the gas convection is the downward movement of the characteristics of the bulb filled with a small amount of inert gas
Metal tungsten sublimation at high temperatures, part of the metal tungsten particles from the filament surface ran out, precipitated in the inner wall of the bulb
The lamp filament is made of metal tungsten. After power, the filament fever, the temperature up to 2500 ℃ above
