* Open Microsoft Teams
* Go to assignments
* You have to read a paragraph and record the audio in Microsoft Teams program
* You can try more than once at the same time
* The assignment ends on Sunday 12 Rabi al-Al Thani at 6.30 am
Television
was not invented overnight by a single person. The work of many people over a
number of decades contributed to its evolution. In the early days, two distinct
schools of thought in technology influenced different researchers and the
course of their investigation.
The first
one was based on the technology of Paul Nipkow’s rotating disks that supported
a mechanical television system, and the second one on an electronic television
system that used a cathode-ray tube developed independently by two inventors,
Campbell-Swinton and Rosing. Paul Nipkow (1860-1940), who invented the Nipkow
disk in 1884, was the first person to discover the scanning principle that
allowed small portions of an image to be analyzed and transmitted. However, it
is unclear whether Nipkow actually built a working prototype of his television
system.
Electronic television is based on the development of the
cathode-ray tube, which can still be found in modern television sets. Philo
Farnsworth (1906-1971) was the first inventor to transmit a television image, a
dollar sign, using the dissector tube which is the basis of all current
electronic televisions. The American engineer started experimenting with
electricity when he was 12.
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