Post by dividavi on Feb 27, 2023 21:57:10 GMT
The correct answer is of course Sir Humphry Davy in 1802. Decades later, researchers like Joseph Swan, John W. Starr, Alexander Lodygin and Thomas Edison made a commercially successful and cheap incandescent system.
www.twinkl.co.th/teaching-wiki/history-of-the-first-light-bulb
A Timeline for Incandescent Light
1845 - John W. Starr patents incandescent light bulb with carbon filaments.
1850 - Joseph Swan begins work on light bulbs.
1860 - Swan patents a partial vacuum, carbon filament incandescent lamp.
1872 - Alexander Lodygin patents an incandescent light bulb with tungsten filaments.
1874 - Henry Woodward and Matthew Evans patent lamps.
1878 - Joseph Swan demonstrates lamp with carbon rod.
1879 - Woodward and Evans sell their light patent to Thomas Edison.
1879 - Edison improves carbon filament lamp, developing a practical incandescent lamp,
1880 - Edison patents an electricity distribution system.
1906 - With improvements in machinery, the carbon filaments were replaced with tungsten for longer light bulb life.
1920s - The first light bulbs with frosted glass are produced, as well as neon lighting.
1930s - one-time flashbulbs are invented for photography using Edison's methods.
1940s - The first 'soft light' bulbs are created for homes.
1990s - 'Long life' bulbs are introduced to homes.
www.twinkl.co.th/teaching-wiki/history-of-the-first-light-bulb
A Timeline for Incandescent Light
1845 - John W. Starr patents incandescent light bulb with carbon filaments.
1850 - Joseph Swan begins work on light bulbs.
1860 - Swan patents a partial vacuum, carbon filament incandescent lamp.
1872 - Alexander Lodygin patents an incandescent light bulb with tungsten filaments.
1874 - Henry Woodward and Matthew Evans patent lamps.
1878 - Joseph Swan demonstrates lamp with carbon rod.
1879 - Woodward and Evans sell their light patent to Thomas Edison.
1879 - Edison improves carbon filament lamp, developing a practical incandescent lamp,
1880 - Edison patents an electricity distribution system.
1906 - With improvements in machinery, the carbon filaments were replaced with tungsten for longer light bulb life.
1920s - The first light bulbs with frosted glass are produced, as well as neon lighting.
1930s - one-time flashbulbs are invented for photography using Edison's methods.
1940s - The first 'soft light' bulbs are created for homes.
1990s - 'Long life' bulbs are introduced to homes.