Презентация на тему к уроку английского презентация урока для интерактивной доски по иностранному языку (4 класс)

changed leisure habits for countless millions was pioneered by

Scottish – born electrical engineer John Logie Baird.
It had been realised for some time that light could be converted into electrical impulses, making it possible to transmit such impulses over a distance and then reconvert them into light.

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.

invention of the telephone in 1876. The following year,

the great American inventor Tomas Edison produced the fist working telephone. With telephones soon becoming rapidly available, the days of letter-writing became numbered.