3.12. the inventions, which made life easier. taqdimot 13 bet

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презентация powerpoint tashkent pharmaceutical institute the department of foreign languages theme: the inventions, which made life easier. write: ___________________________ check: ___________________________ the theme: the inventions, which made life easier. plan. 1. invention of the telephone. 2. mobile phone. 3. the invention of the computer. 4. television. 5. internet. 6. electro-magnetic transmitters and receivers. 7. invention of radio. 8. sources. 1. invention of the telephone. the modern telephone is the culmination of work done by many individuals. alexander graham bell was the first to patent the telephone, an "apparatus for transmitting vocal or other sounds telegraphically", after experimenting with many primitive sound transmitters and receivers. however, the history of the invention of the telephone is a confusing collection of claims and counterclaims, made no less confusing by the many lawsuits which attempted to resolve the patent claims of several individuals. 2. mobile phone. a or mobile (also called cellphone and handphone) …

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tain and the usa, and were turned into working machines. 3. the invention of the computer. 4. television. in 1921 the 14-year-old mormon had an idea while working on his father's idaho farm. mowing hay in rows, philo realized an electron beam could scan a picture in horizontal lines, reproducing the image almost instantaneously. this would prove to be a critical breakthrough in philo farnsworth's invention of the television in 1927. earlier tv devices had been based on an 1884 invention called the scanning disk, patented by paul nipkow. riddled with holes, the large disk spun in front of an object while a photoelectric cell recorded changes in light. depending on the electricity transmitted by the photoelectric cell, an array of light bulbs would glow or remain dark. though nipkow's mechanical system could not scan and deliver a clear, live-action image, most would-be tv inventors still hoped to perfect it. …

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ibration frequencies — that is to say, more than one musical tone — can be sent over the same wire simultaneously, the harmonic telegraph can be utilised as a 'multiplex' or many-ply telegraph, conveying several messages through the same wire at the same time. each message can either be read by an operator by the sound, or from different tones read by different operators, or a permanent record can be made by the marks drawn on a ribbon of travelling paper by a morse recorder. on 27 july 1875, gray was granted u.s. patent 166,096 for "electric telegraph for transmitting musical tones" (the harmonic telegraph). 7. invention of radio. physics of wireless signalling several different electrical, magnetic, or electromagnetic physical phenomena can be used to transmit signals over a distance without intervening wires. the various methods for wireless signal transmissions include: electrical conduction through the ground, or through water. magnetic …

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презентация powerpoint tashkent pharmaceutical institute the department of foreign languages theme: the inventions, which made life easier. write: ___________________________ check: ___________________________ the theme: the inventions, which made life easier. plan. 1. invention of the telephone. 2. mobile phone. 3. the invention of the computer. 4. television. 5. internet. 6. electro-magnetic transmitters and receivers. 7. invention of radio. 8. sources. 1. invention of the telephone. the modern telephone is the culmination of work done by many individuals. alexander graham bell was the first to patent the telephone, an "apparatus for transmitting vocal or other sounds telegraphically", after experimenting with many primitive sound transmitters and receivers. however, the history of the i...

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