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Описание презентации Inventions and their inventors Have you ever по слайдам
Inventions and their inventors
Have you ever dreamed of becoming a great inventor—of having a fantastically clever idea that changes society for the better and makes you rich in the process? The history of technology is, in many ways, a story of great inventors and their brilliant inventions.
The 20 thth century has given us plenty of things that improve our lives : : TV, calculators, mobile phone, CDs, a utomobile , , computer, a irplane , c, c amera , , rr adio , i, i nternet ……
This inventions have also given us some household objects that make our lives easier and more comfortable. Some inventions lose their popularity over time while others prove to be irreplaceable.
TVTV Television is a medium of telecommunication which is primarily used for transmitting and receiving moving images accompanied by sound. This invention that swept the world and changed leisure habits for countless millions was pioneered by Scottish-born electrical engineer John Logie Baird.
John Logie Baird a Scottish engineer and inventor of the world’s first working television system in Hastings, England in 1923. The system was successful enough to become commercialised, and the BBC began the world’s first regular television broadcasts, using the Baird system, In 1927, Baird transmitted a long-distance television signal over 438 miles. Baird showed color television using a cathode ray tube in front of which revolved a disc fitted with color filters, a method taken up by CBS and RCA in the United States. In 1941 He patented and demonstrated a system of three dimensional television at a definition of 500 lines. 16 August 1944 he gave the world’s first demonstration of a fully electronic color television display.
Mobile phone now used by millions of people appeared in 1973. The American Martin Cooper invented the first mobile phone – Motorola Dyna-Tec. It weighed a kilo. But it took five years to draw in a commercial operator from Bahrein. Now mobile phones have made a massive impact on social and working activities and changer the way we communicate.
Computer Personal computers are now commonplace in most homes throughout the world, and are relied on heavily by both individuals and businesses. The invention of the computer is relatively new, emerging into our lives relatively late in the 20 th century. The first computers were huge. They were used for scientific purposes. Sinklair ZX 80, the 1980 machine, was the first computer used by ordinary people.
The computer has been another life-transforming invention. British mathematician Charles Babbage designed a form of computer in the mid-1830 s, but it was not until more than a century later that theory was put into practice. Now, a whole generation has grown up with calculators, windows, icons, computer games and word processors, and the Internet and e-mail have transformed communication and information.
Internet The global network was designed for serious scientific purposes. In 1962 the US scientists started to build a network between the leading scientific centres of the USA. In 1969 this network joined four universities. In 1972 the first e-mail with the symbol @ was sent.
Radio Nicola Tesla, a Serbian Scientist, designed the first radio in 1892. He also designed a Radio Controlled Robotic Boat using similar technologies. Sir Oliver Lodge brought considerable improvement to the original design in the form of a coherer, a primitive form of radio signal detector. He is the first person to transmit a successful radio signal.
The invention of the radio was a huge step in the field of technology. Since the time it was invented most of us have forgotten how useful a radio can prove to be even in the present world where computers and laptops have dominated. The sound that can be heard emitting from radio speakers is mainly attributed to the transmission of radio signals, known as a process called modulation. The modulation of electromagnetic waves transmit the signals at a low frequency.
Airplane One of the biggest inventions of 20 th century, the airplane has added a new dimension to our lives. It was an important invention that opened new vistas for advanced developments in the field of aviation.
The invention of airplane changed the way we travel and also made traveling very comfortable. Airplanes gave us the opportunity to explore different parts of the world. Tackling emergency situations like floods became easier. Airplanes are also an important part of the defense services. The aircraft that we see today can be classified into two types i. e. fixed-wing aircraft and rotatory-wind aircraft. Earlier, in the 18 th century, hot air balloons were developed for flight. It was in 1783 that the Montgolfier Brothers built a hot air balloon for the first time. The lack of thrust needed to power the aircraft and absence of navigation tools were the major problems associated with hot air balloons. However, this didn’t stop people from working in the field of airplane development and eventually the airplane was invented.
The Wright Brothers from USA invented the first airplane. Wilbur and Orville, the Wright Brothers were born on 16 th April, 1867 and 19 th August, 1871 respectively. They didn’t continue their education after high school and instead decided to open a bicycle repair shop. They used to study the experiments and research taking place in the field of airplane development. Their interest and passion for airplanes led to the development of the first heavier-than-air plane. First Airplane to Fly The Wright Brothers, Wilbur and Orville began working on the idea of building airplanes in 1899. They finally succeeded in flying the first airplane on 17 th December, 1903. It was a historic day, since many attempts to manufacture an airplane had earlier met with failure.
Photography Leonardo da Vinci had described the camera obscura photographic principle as early as 1515. But it was not until 1835 that Frenchman Louis Daguerre produced camera photography. The system was gradually refined over the years, to the joy of happy snappers and the despair of those who had to wade through friends’ endless holiday pictures.