what year was the light bulb invented?
364493
Thomas Edison - invented the light bulb in 1879.
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Lewis Waterman in 1884\nhttp://inventors.about.com/library/weekly/aa100897.htm
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Two- one to change it, the other one to scratch its bottom. :-)\n\nHow many economists does it take to screw in a light bulb?\n\nNone. If the light bulb really needed changing, market forces would have already caused it to happen.
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Telephone-Bell\nTelevision-Zworykin's adaptation of the cathode-ray tube emerged as the basis for modern televisions.\nlight bulb-Edison
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Nobody invented electricity - it is a naturally occuring phenomenon (for example - lightning) that has been around as long as Earth. Benjamin Franklin is often credited with discovering the properties of electricity (although this is probably a myth), and Thomas Edison invented the electric light.
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Vaccination: Physician Edward Jenner performed the first innoculation against smallpox by infecting a boy with cowpox (vaccinia virus) in 1796.\n\nLight bulb: In 1879 in America Thomas Alva Edison, and in England Joseph Swan, each produce carbon-thread electric lamps that can burn for practical lengths of time (about 40 hours).
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Thomas Edison - would test over and over and over...and find 100 things that did not work.....think of the light bulb..and I think you will see the light!.....along with  about a thousand other things called inventions!
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-j is correct.\nBulb 64 is ON at the end (changed 7 times by persons 1, 2, 4, 8, 16, 32, and 64).\nThe 10 light bulbs that are ON at the end were changed an odd number of times, which are light bulbs 1 (changed 1 time), 4 (3 times), 9 (3 times), 16 (5 times), 25 (3 times), 36 (9 times), 49 (3 times), 64 (7 times), 81 (5 times) and 100 (9 times).
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The invention of the incandescent light bulb has a history spanning from the early 1800s. Until that time, available light sources consisted of candles, oil lanterns, and gas lamps. \n\nIn 1809, an English chemist, Humphrey Davy, started the journey to the invention of a practical incandescent light source. He used a high power battery to induce current between two charcoal strips. The current flowing through the two charcoal strips produced an intense incandescent light, creating the first arc lamp. \n\nIn 1820, Warren De la Rue made the first known attempt to produce an incandescent light bulb. He enclosed a platinum coil in an evacuated tube and passed an electric current through it. The design was based on the concept that the high melting point of platinum would allow it to operate at high temperatures and that the evacuated chamber would contain less gas particles to react with the platinum, improving its longevity. Although it was an efficient design, the cost of the platinum made it impractical for commercial use.\n\nThe invention of the light bulb is usually attributed in Britain to Joseph Wilson Swan and in the United States to Thomas Alva Edison(and his asstant Timothy) (the first to market the device successfully). Alexander Nikolayevich Lodygin independently developed an incandescent light bulb in 1874. Many others also had a hand in the development of a practical device for the production of electric light.
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A very early form of electric energy was the ancient egyptians made simple batteries from clay pots, copper rods and lemon juice. Probaly for primitive polarity experiments. Electricity was probaly first used practicaly by thomas edison when he created the lightbulb. The cathode ray tube was also a great success, made in the late 19th early 20th century. When they fired electrons in a contained glass tubs a black spot would show up on a far end. This idea eventualy evolved into the television. G.Boole a scientist in the 18th century created a form of math called Boolean Logic, this math has been used in circuit boards and electronics to this day. He also created a computational machine. It was far more mechanical than electronic however.
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Thomas Edison invented MANY things in his life:\n\n1. Incandescent lamp (aka the light bulb)\n2. Invented the microphone inside of telephones\n3. The locomotive train was a biggie.
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Ane electric bulb, of course!
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1910: Edison first talking motion picture\n1911: Charle Franklin Kettering firts automobile electrical ignition system\n1914: Garret A. Morgan invented the gas mask.\n1915: Eugene Sullivan and William Taylor invemted Pyrex glass.\n1916: Henry Brearly invented stainless steel.\n1918: Edwin Howard Armstrong invented the superheterodyne radio circuit.\n1919: The arc welder.
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(m)\n\n\n\nThe very first traffic light was a revolving gas lantern with red and green lights installed in a London intersection in 1868, before the advent of automobiles. A later version of the traffic light based on railroad signals was installed in Detroit, Michigan, in 1920. But we have Garrett Augustus Morgan to thank for the modern version and first patent of this traffic-stopping invention. \n\nThe son of former slaves, Morgan was born in 1877 in Kentucky. He later moved to Cincinnati and then Cleveland, where he owned and operated a sewing-machine repair business and earned quite a reputation as a technician. A multi-talented businessman, Morgan went on to establish the newspaper The Cleveland Call. \n\nIn early 20th century Cleveland, as in other major U.S. cities, the roads were clogged with pedestrians, bicycles, animal-drawn wagons, and those newfangled automobiles. There were no traffic laws to speak of, and chaos ruled the streets. Accidents were frequent. After witnessing one such traffic accident, Morgan felt compelled to improve the situation. The result? The precursor to the modern traffic signal, patented on November 23, 1923. \n\nThe world’s first traffic light came into being before the automobile was in use, and traffic consisted only of pedestrians, buggies, and wagons.  Installed at an intersection in London in 1868, it was a revolving lantern with red and green signals.  Red meant "stop" and green meant "caution."  The lantern, illuminated by gas, was turned by means of a lever at its base so that the appropriate light faced traffic.  On January 2, 1869, this crude traffic light exploded, injuring the policeman who was operating it.
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He invented a "photophone", the predecessor to our fiber optics.  It was a way to transmit information, in the form of sound, over light. In addition, he invented a vacuum jacket that would eventually become the iron lung used in polio cases in the 50s.  He also pioneered into the area of desalinization, "alternative energies" and recycling.  He also invented the concept of metal detectors, using an inductive pickup coil.
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Let There Be Light" -- The flashlight was invented in 1898, and the biblical quote of "Let There Be Light" was on the cover of the 1899 Eveready catalog.\n\nThe original owner of the American Eveready Battery Company, Joshua Lionel Cowen, abandoned the hardware company to pursue his real passion of trains. Cowen was an inventor of sorts; he developed a fuse to ignite photographic flash powder. Though the invention failed in its intent, the U.S. Navy bought up the fuses to use with underwater explosives.\n\nCowen next came up with an idea for a decorative lighting fixture for potted plants: a metal tube with a light bulb and a dry cell battery that could run the light bulb for 30 days. He passed the idea along to one of his Eveready salespersons, Conrad Hubert, along with his company. Hubert turned the metal tube, light bulb and battery into the world's first flashlight, and began selling the batteries and the flashlight, together and as separate items.\n\nHubert became a multi-millionaire, Eveready became a huge company, and Joshua Lionel Cowen finally achieved the success he really wanted: he was the person who invented toy trains in 1900. As happened with the fuses and the flashlight, Cowen was actually trying to invent something else when he invented toy trains. He originally intended to create a store window display, a battery powered  toy car that travelled on a circle of track. People wanted to buy the display more than the real merchandise for sale. Cowen started Lionel Model Trains.
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I think it was made available to ordinary people in the 1960's as an interesting lighting effect.  Some flourescent paints used on psychedelic posters were made sensitive to "black light", so when you turned on a black light bulb in a dark roolm, you got a really trippy poster.\nAh, the colours, the colours.  Has anyone seen my good friend John?