On 31 December 1879, Thomas Edison demonstrated
incandescent lighting to the public for the first time, in Menlo Park, New
Jersey.
An incandescent lamp is an electric light with a
wire filament heated until it glows. The filament is enclosed in a glass bulb
with a vacuum or inert gas to protect the filament from oxidation. Current is
supplied to the filament by terminals or wires embedded in the glass. A bulb
socket provides mechanical support and electrical connections.
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