incandescent lamp construction and working

Old Light Bulbs aka Incandescent Lamps

Around 1880, many research experiments were being conducted for the development of a constant electric light bulb. Thomas Edison had acquired a US patent for “an electric lamp using carbonized filament” which could last for up to 1200 hours. Though they had developed an electric light bulb (incandescent lamp), they could not sell the bulbs […]

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