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Why does a fluorescent light bulb glow when rubbed with a piece of nylon or silk in the dark?
Wiki User
∙ 6y ago
Because the electrons from the Nylon cloth or silk are being passed to the light bulb
Josefa Bergnaum
Wiki User
∙ 10y agoFluorescent bulbs contain a low pressure Mercury vapour. The electricity excites the gas which emits UV light. The inside of the glass is coated with a phosphor. The UV light excites the phosphor which emits visible light.
When you rub the bulb with a piece of nylon you are rubbing electrons from one material to the other (i think from nylon to bulb). This results in static electricity which excites the mercury vapour in much the same way as the electric current in normal operation.
Wiki User
∙ 6y agoElectrons are transferred from the cloth to the inside of the tube. If there are enough electrons, then they will flow through the tube (creating a current) and the mercury vapor is briefly excited, and the tube will momentarily glow. See related question.
Wiki User
∙ 8y agoBecause the electrons from the Nylon cloth or silk are being passed to the light bulb
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