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Whay does a light bulb get hot ?

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Whay does a light bulb get hot ?

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  1. heat is the energy converted from light.

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  2. Because as the tungsten filament receives the current  the filament attempts to resist the passage of current ( high resistance ) and this causes the filament to glow. Most of the energy of the bulb is in the visible  and infrared ranges so this causes large amounts of heat to be transferred to the glass envelope surrounding the filament
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