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Physicsissuef
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Why when sometimes touch the glass balloon around the light bulb, it is hot?
||spoon|| said:the filament of the globe is extremely hot. I suppose it is just heat transfer from this.
There is light because of the collision of the electrons with the atoms of the filament. So that's how there is light. But where the heat come from??||spoon|| said:the light from the filament is caused by the random excitation of electrons due to the heating of the filament due to the current passing through it. This is why the light voming from a lightbulb is incoherent.
Physicsissuef said:Isn't just visible light released from the filament? Where the IR light comes from?
Glass is made primarily of silica, which has a high melting point. When heated, the molecules within the glass begin to vibrate and move more freely, creating heat energy. The more heat energy that is added, the hotter the glass becomes.
Inside a light bulb, there is a filament made of a thin coil of tungsten. When an electric current passes through the filament, it heats up and begins to emit light. This process is called incandescence. The glass bulb surrounding the filament helps to contain the heat and protect the filament from burning out too quickly.
In a traditional incandescent light bulb, the inert gas (usually argon or krypton) helps to slow down the evaporation of the filament, allowing it to last longer. The gas also helps to dissipate heat and prevent the glass from shattering due to the high temperatures produced by the filament.
Energy-efficient light bulbs, such as LED or fluorescent bulbs, use different mechanisms to produce light. LED bulbs use a semiconductor material that emits light when an electric current passes through it, while fluorescent bulbs use gas and electricity to produce ultraviolet light, which is then converted into visible light by a phosphor coating on the inside of the bulb.
Yes, glass from light bulbs can be recycled. However, it is important to properly dispose of light bulbs, as they may contain small amounts of mercury, which can be harmful to the environment if not disposed of correctly. Many local recycling centers accept used light bulbs for recycling.