In Davisson and Germer experiment, the tungsten filament is coated with:
A
aluminium oxide
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B
barium, chloride
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C
titanium oxide
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D
barium oxide
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Solution
The correct option is D barium oxide Barium oxide reduces the work function of the filament , which results in ease of ejection of electrons during thermionic emission.So tungsten filament is coated with barium oxide.