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In 1854, John Tyndall demonstrated to the Royal Society that light could be conducted through a curved stream of water. This proved that a light signal could be bent. In 1880, Alexander Graham Bell invented his 'Photophone', which transmitted a voice signal on a beam of light.
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Frank McNamara came up with the idea of the credit card when he went out to supper with a dinner partner. His partner forgot his wallet, and that gave McNamara the idea for the credit card. His idea was that you would have a card that would be accessible at all times with money on it.
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Everything that happened after the telivison was invented was affected by the telvision. Space races, speeches, now almost every major event could be internationally viewed
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The transistor radio was useful because it was pocket sized, and you could listen to music anywhere.
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It was designed to record the flight crew's conversation. The purpose was to help identify the reason if a plane crashed or caught on fire.
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Polypropylene is a thermo plastic wire used in a variety of applications. It is in thermal under wear, ropes, packaging, and more. It is also used in insulating wire
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was the first artificial Earth satellite
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3-D is a motion picture that enhances the illusion of depth perception. A regular image is recorded from two different angles, and then placed together. The viewer has to wear special glasses to be able to see in 3-D
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Digital modems developed from the need to transmit data for North American air defense during the 1950s. Modems were used to communicate data over the public switched telephone network. A modem sends and recieves data between two computers.
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The name LASER is an acronym for Light Amplification by the Stimulated Emission of Radiation. In 1917 Albert Einstein theorized about the process which makes lasers possible called "Stimulated Emission". In 1954, two scientists invented the maser, which was a similar invention but did not use a visible light.
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a machine that makes paper copies of documents and other visual images quickly and cheaply.
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John Hopps invented the first cardiac pacemaker. If a heart stopped beating due to cooling, it could be started again by artificial stimulation using mechanical or electric means.
