Коллоквиум часть 1

Who developed the theory of electromagnetic waves? What is another name for that theory?

Maxwell developed the theory of electromagnetic waves. Another name for it is Maxwell's Equations or Classical Electromagnetism.

Whose ideas did Maxwell incorporate into his unified theory of electromagnetism?

He incorporated the previous work of scientists like Michael Faraday (fields and lines of force), André-Marie Ampère (electrodynamics), and Carl Friedrich Gauss (electrostatics).

Who verified Maxwell’s ideas experimentally?

Hertz verified Maxwell's ideas experimentally in the late 1880s.

What is a coherer? Who invented it?

A coherer was an early radio wave detector consisting of a glass tube filled with metal filings. Its resistance decreased when exposed to radio waves. It was invented by Édouard Branly, and later improved by Oliver Lodge.

What did Tesla demonstrate in 1892?

Tesla demonstrated a wireless radio-controlled boat.

Could the first radio transmit voice?

No, the first radio systems transmitted signals using Morse code, not voice.

What did Popov demonstrate in 1895?

Popov demonstrated a lightning detector, which was effectively the first radio receiver.

What can you say about Fessenden’s contribution to radio broadcast development?

Fessenden made the first long-distance transmission of voice and music in 1906, which was a fundamental breakthrough for audio broadcasting.

What did Marconi patent in 1896?

Marconi patented a system for wireless telegraphy (radio communication).

When and where did Marconi establish the first radio station?

He established the first wireless telegraphy station in 1897 on the Isle of Wight, England.

How did Popov use the first radio receiver that he built in 1894?

He used it to detect and record lightning strikes and atmospheric electricity.

How could Hertz transmit and receive electromagnetic waves in 1886?

He used a spark-gap transmitter (a dipole antenna with a spark gap) to generate waves and a simple loop of wire with a small gap (a resonator) to detect them.