Does the tungsten wire change during the bulb lighting?
Temperature and quality have not changed, so the same, you have to insist that tungsten wire will have sublimation lead to lower quality, that is, the energy can also become smaller
The change in the inner energy of the tungsten wire is transmitted to the bulb glass through heat radiation and then to the air. On the other hand can be converted into light energy. Again is the light gun tungsten wire will have sublimation lead to lower quality, that is, the internal energy also becomes smaller.
The changes in the internal energy of the tungsten during the lighting process are changed by doing work and heat transfer. The filament glows, consumes electricity, gets light and energy
Light bulb during the process of light can not change, on the one hand the energy into energy, while the internal energy into light energy, has been radiated out, the total remains unchanged
