thomas alva edison invented the first efficient incandescent light bulb that was later improved and eventually used in projectors.
thomas alva edison invented the first efficient incandescent light bulb that was later improved and eventually used in projectors.
who invented the first efficient incandescent light bulb that was later improved and eventually used in projectors?
thomas alva edison
Na
Na
the common symbol for inventiveness, the light bulb, is an example. the first incandescent light bulb was invented by british chemist sir humphry davy in 1802. many subsequent inventors improved davy's invention prior to the successful commercialization of electric lighting by thomas edison in 1880, 78 years later. electric lighting continued to be developed. edison's carbon filament light bulb was made obsolete by the tungsten filament light bulb, invented in 1904 by sándor just and franjo hanaman. it is this that forms the popular conception of a light bulb, though there are other major forms of lighting. the principle of fluorescent lights was known since 1845, and various inventors, including edison and nikola tesla worked on them without commercial success. various improvements were made by many other inventors, until general electric introduced "fluorescent lumiline lamps" commercially in 1938, first available to the public at the 1939 world's fair. led lamps also have a long history, with the first light-emitting diode (led) invented in 1927 by oleg losev. leds were initially of low brightness, and have been used as indicator lamps and seven-segment displays since 1968. it wasn't until the development of high efficiency blue leds by shuji nakamura in the 1980s that white leds for lighting applications became practical. although higher cost than incandescent light bulbs, leds have higher efficiency and longer life and may finally displace light bulbs in general lighting applications. in each case, more than 50 years passed between the initial invention and commercial success in general lighting applications.
list of prolific inventors