Разделы презентаций


The radio invention

What is radio?Radio is the transmission of signals by modulation of electromagnetic waves with frequencies below those of visible light. Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass

Слайды и текст этой презентации

Слайд 1The radio invention

The radio invention

Слайд 2What is radio?

Radio is the transmission of signals by modulation

of electromagnetic waves with frequencies below those of visible light.

Electromagnetic radiation travels by means of oscillating electromagnetic
fields that pass through the air
and the vacuum of space.
Information is carried by systematically
changing (modulating) some property
of the radiated waves, such
as amplitude, frequency, phase,
or pulse width. When radio
waves pass an electrical conductor, the
oscillating fields induce an alternating current
in the conductor. This can be detected and transformed into sound or other signals that carry information.
What is radio?Radio is the transmission of signals by modulation of electromagnetic waves with frequencies below those

Слайд 3Who has invented radio?

In 1895 Alexander Stepanovich Popov built

his first radio receiver, which contained a coherer. Further refined

as a lightning detector, it was presented to the Russian Physical and Chemical Society on May 7, 1895. A depiction of Popov's lightning detector was printed in the Journal of the Russian Physical and Chemical Society the same year. Popov's receiver was created on
the improved basis of Lodge's
receiver, and originally
intended for reproduction
of its experiments.
Who has invented radio? In 1895 Alexander Stepanovich Popov built his first radio receiver, which contained a

Слайд 4Who is Popov?
Alexander Stepanovich Popov (1859-1906)
was a

Russian physicist who first demonstrated the practical
application of electromagnetic

(radio) waves, although
he did not apply for a patent for his invention.
Born in the village Turinskiye Rudniki
(now Krasnoturinsk, Sverdlovsk Oblast)
in the Ural mountains as the son of a priest,
he became interested in natural sciences
early in his youth. His father ensured
that Alexander received a good education
at the seminary at Perm, and later studying physics at the St. Petersburg university. After graduation in 1882 he started to work as a laboratory assistant at the university. However, due to the bad funding of the university he changed to a teaching job at the Russian Navy's Torpedo School in Kronstadt on Kotlin Island.
Beginning in the early 1890s he conducted experiments along the lines of Heinrich Hertz's research. In 1894 he built his first radio receiver, which contained a coherer.

Further refined as a lightning detector, it was presented to the Russian Physical and Chemical Society on May 7, 1895—the day has been celebrated in the Russian Federation as "Radio Day“.

Who is Popov?  Alexander Stepanovich Popov (1859-1906) was a Russian physicist who first demonstrated the practical

Слайд 5Radio day.

Radio Day is a commemoration of the development

of radio in Russia. It takes place on May 7,

the day in 1895 on which Alexander Popov successfully demonstrated his invention.
Radio Day was first observed in
the Soviet Union in 1945,
on the 50th anniversary of
Popov's experiment, and some
four decades after his death.
Radio Day is officially marked in Russia
and Bulgaria.
Radio day. Radio Day is a commemoration of the development of radio in Russia. It takes place

Слайд 6Radio nowadays.


Today radio is popular mass media.
There are

many radio stations worldwide.
Any of them can be caught

practically everywhere. Despite the fact that where you are.
The problem of Popova has been
executed.
He has created the device which can
function without wires.
Radio nowadays. Today radio is popular mass media. There are many radio stations worldwide. Any of them

Обратная связь

Если не удалось найти и скачать доклад-презентацию, Вы можете заказать его на нашем сайте. Мы постараемся найти нужный Вам материал и отправим по электронной почте. Не стесняйтесь обращаться к нам, если у вас возникли вопросы или пожелания:

Email: Нажмите что бы посмотреть 

Что такое TheSlide.ru?

Это сайт презентации, докладов, проектов в PowerPoint. Здесь удобно  хранить и делиться своими презентациями с другими пользователями.


Для правообладателей

Яндекс.Метрика