Выполнила : студентка 2- го курса группы ИТС -21 Аппакова Евгения Александровна

On May 7, 1895, the Popov demonstrated the world's first radio receiver, which he called "a device for detecting and recording electrical oscillations." The date of this report is now recognized as the birthday of the radio.

THOMAS EDISON( ) In 1879, the world famous American inventor Thomas Edison received a patent for a light bulb. He also later invented a film projector and phonograph.

In July 1897, Marconi managed to patent his invention, the wireless telegraph.

Using purely mathematical reasoning, Maxwell showed that all electrical and magnetic phenomena can be reduced to stresses and movements in the medium, which he called the ether.

The main achievement is the experimental confirmation of the electromagnetic theory of light by James Maxwell. Hertz proved the existence of electromagnetic waves. In , Hertz first observed and described external photoelectric effect.

All of them played a very important role in the history of the development of physics.