Why is incandescent pear shaped?
And the bulb is made into a pear-shaped shape, so that when the inert gas in the bulb conveys
Scientists are based on gas convection is a bottom-up feature, filled with a small amount of inert gas in the bulb
Over time, the light bulb will turn black, reduce the brightness, affect the lighting
Temperature up to 2500 0 C. metal tungsten sublimation at high temperatures, part of the metal tungsten particles
The filament of the bulb is made of metal tungsten
