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Physics
Classical Physics
Electromagnetism
Can infrared photons also eject electrons in 'photoelectric effect'?
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[QUOTE="sophiecentaur, post: 6418132, member: 199289"] Thermionic emission is a common phenomenon. The hot filament in thermionic valves liberates electrons from its surface. They can be drawn off from the filament by a very low Potential Difference between this Cathode and a positive Anode. This doesn't 'generate electricity' though. However, neither photo electrons nor thermionic electrons are a useful source of energy in themselves. The most effective way to get energy from photons is to use the energy gap across the gap in a semiconductor device (Photovoltaics) or with the Seebeck effect, which produces a current with two junctions - (hot and cold). It's the Seebeck effect that works a stove fan; hot junction in close contact with the stove top and cool(er) junction in contact with the heatsink (blown by the fan, once it gets going). The [/QUOTE]
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Physics
Classical Physics
Electromagnetism
Can infrared photons also eject electrons in 'photoelectric effect'?
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