who invented the laser?
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The invention of the laser, which stands for light amplification by stimulated emission of radiation, can be dated to 1958 with the publication of the scientific paper, Infrared and Optical Masers, by Arthur L. Schawlow, then a Bell Labs researcher, and Charles H. Townes, a consultant to Bell Labs. That paper, published in Physical Review, the journal of the American Physical Society
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Michael Farday invented electricity as we know it.\nAs a sidenote If Benny Franklin was  a creator of anything it was the lightning rod and the grounding priciple.\nFor centuries electricity has been a challenge to scientists. They have long known that it exists, and have discovered how to generate it on a large scale, but find it difficult to explain exactly what electricity is.\n\nWhere did it all begin?\n\nAround 600 BC Greeks found that by rubbing an 'electron' (a hard Fossilised resin that today is known as Amber) against a fur cloth, it would attract particles of straw. This strange effect remained a mystery for over 2000 years, until, around AD 1600, Dr William Gilbert investigated the reactions of amber and magnets and first recorded the word 'Electric' in a report on the theory of magnetism.\n\nGilbert's experiments led to a number of investigations by many pioneers in the development of electricity technology over the next 350 years.\n\nBenjamin Franklin(in his own words)\n Franklin was an American writer, publisher, scientist and diplomat, who helped to draw up the famous Declaration of Independence and the US Constitution. In 1752 Franklin proved that lightning and the spark from amber were one and the same thing. The story of this famous milestone is a familiar one, in which Franklin fastened an iron spike to a silken kite, which he flew during a thunderstorm, while holding the end of the kite string by an iron key. When lightening flashed, a tiny spark jumped from the key to his wrist. The experiment proved Franklin's theory, but was extremely dangerous - He could easily have been killed.\n\nGalvani and Volta\n In 1786, Luigi Galvani, an Italian professor of medicine, found that when the leg of a dead frog was touched by a metal knife, the leg twitched violently. Galvani thought that the muscles of the frog must contain electricity. By 1792 another Italian scientist, Alessandro Volta, disagreed: he realised that the main factors in Galvani's discovery were the two different metals - the steel knife and the tin plate - apon which the frog was lying. Volta showed that when moisture comes between two different metals, electricity is created. This led him to invent the first electric battery, the voltaic pile, which he made from thin sheets of copper and zinc separated by moist pasteboard.\n\nIn this way, a new kind of electricity was discovered, electricity that flowed steadily like a current of water instead of discharging itself in a single spark or shock. Volta showed that electricity could be made to travel from one place to another by wire, thereby making an important contribution to the science of electricity. The unit of electrical potential, the Volt, is named after Volta.\n\nMichael Faraday\n The credit for generating electric current on a practical scale goes to the famous English scientist, Michael Faraday. Faraday was greatly interested in the invention of the electromagnet, but his brilliant mind took earlier experiments still further. If electricity could produce magnetism, why couldn't magnetism produce electricity.\n\nIn 1831, Faraday found the solution. Electricity could be produced through magnetism by motion. He discovered that when a magnet was moved inside a coil of copper wire, a tiny electric current flows through the wire. Of course, by today's standards, Faraday's electric dynamo or electric generator was crude, and provided only a small electric current be he discovered the first method of generating electricity by means of motion in a magnetic field.\nThomas Edison and Joseph Swan\n Nearly 40 years went by before a really practical DC (Direct Current) generator was built by Thomas Edison in America. Edison's many inventions included the phonograph and an improved printing telegraph. In 1878 Joseph Swan, a British scientist, invented the incandescent filament lamp and within twelve months Edison made a similar discovery in America.\n\nSwan and Edi
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Here ya go!\n\nhttp://science.howstuffworks.com/laser.htm
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If you look at this site, you'll find out about the flashlight, as it's called in the United States.\n\nhttp://www.ideafinder.com/history/inventions/story014.htm\n\nIt says, in part:\n\nAlthough a flashlight is a relatively simple device, its invention did not occur until the late 19th century because it depended upon the earlier invention of the electric battery and electric light. Conrad Hubert received a US patent in 1903 , number 737,107 issued August 26, for a flashlight with an on/off switch in the now familiar cylindrical casing containing lamp and batteries. \n\nInvention: flashlight in 1902  \nDefinition: noun / flash·light, flashlight, flash-light \nFunction: a small portable battery-powered electric lamp, typically flashlight consists of a small electric light bulb with associated parabolic reflector, powered by electric batteries, and with an electric power switch \nPatent: 737,107 (US) issued August 26, 1903 \n \nInventor: Conrad Hubert (aka Akiba Horowitz)   \nCriteria: First practical. Modern prototype. Entrepreneur. \nBirth: April 15, 1856 in Minsk, Russia \nDeath: 1928 \nNationality: American (of Russian decent) \n \nThere's a timeline of facts pertinent to the flashlight there as well.
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Yes. Nikola Tesla actually invented the radio, but Marconi took (and still gets) credit for it.
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Robert Esnault-Pelterie would be most likely inventor if you wish to agree with the majority of researchers.\nFeel free to visit the source for information over the two mentioned inventors.
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It was invented by Micheal Faraday.  It was perfected by Robert Bunsen and his assistant, Peter Desaga.\n\nSee http://en.wikipedia.org/wiki/Bunsen_burner
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Leo Baekeland\nSetting out to make an insulator, he invented the first true plastic and transformed the world\n1907
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José Ignacio Barraquer \nhttp://en.wikipedia.org/wiki/Lasik\nhttp://en.wikipedia.org/wiki/Jose_Barraquer\n\nThere are several other contributors listed under "Technology Development" in the Lasik wiki article.
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A laser is composed of an active laser medium, or gain medium, and a resonant optical cavity. The gain medium transfers external energy into the laser beam. It is a material of controlled purity, size, and shape, which amplifies the beam by the quantum mechanical process of stimulated emission, discovered by Albert Einstein while researching the photoelectric effect. The gain medium is energized, or pumped, by an external energy source. Examples of pump sources include electricity and light, for example from a flash lamp or from another laser. The pump energy is absorbed by the laser medium, putting some of its particles into high-energy ("excited") quantum states. When the number of particles in one excited state exceeds the number of particles in some lower-energy state, population inversion is achieved. In this condition, an optical beam passing through the medium produces more stimulated emission than the stimulated absorption, so the beam is amplified. An excited laser medium can also function as an optical amplifier.
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Hmm. . its pretty rare stuff so you are not going to hand out samples\nSince it was once used in lasers you could start your presentation with a laser light show, or just a simple laser pointer\nPresent the information chronologically, show how and why it was discovered (it started as a blank square on the Periodic Table of the Elelments) talk about it uses and why it was replaced\ngood luck
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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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Thomas Alva Edison (February 11, 1847 – October 18, 1931) was an American inventor and businessman who developed many devices which greatly influenced life in the 20th century. Dubbed "The Wizard of Menlo Park" by a newspaper reporter, he was one of the first inventors to apply the principles of mass production to the process of invention, and can therefore be credited with the creation of the first industrial research laboratory. Some of the inventions credited to him were not completely original, but alterations of earlier patents (most famously the light bulb), or were actually the work of his numerous employees. Nevertheless, Edison is considered one of the most prolific inventors in history, holding 1,093 U.S. patents in his name, as well as many patents in the United Kingdom, France, and Germany.
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LASER is an acronym for\nLight Amplification by Stimulated Emission of Radiation
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First off, you probably don't have the resources to make a decent pen laser.  This kind of thing is something a big company with nice machinery can mass produce.  Still, the info below might be of use.\n\n"Easy" instructions for making a laser (from parts): http://van.hep.uiuc.edu/Van/qa/section/Light_and_Sound/Lasers/939927573.htm\n\n"Hard" instructions for making a laser (from scratch): http://repairfaq.ece.drexel.edu/sam/lasercon.htm\n\nBurning paper for fun will be more easily accomplished with a magnifying glass and the sun.  If you want something really cool, try building an ion ray gun (yes, they are real).  You can turn on florescent lights by shooting them, among other fun things.  http://www.amazing1.com/ion-gun.htm\n\nAll of these except the "easy" laser gun are serious endeavors and will require substantial effort on your part.  At the very least, you should know how to use a schematic and how to solder.
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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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who invented computer