Why do hot metals emit radiation - atom vibrations?

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mrmojorizing8
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Why does a tungsten filament light bulb (or any heated metal for that matter) emit EM radiation (both visible and infrared) - is the EM radiation due to vibration of molecules or electron excitation?
 
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mrmojorizing8 said:
is the EM radiation due to vibration of molecules or electron excitation?

both
 
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