Wireless communication _________ the spectrum from 9 kHz to 300 GHz.: ответ на тест 1059484 - Английский язык

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The range of radio 1______________ in space is extending more and more. There is every reason to believe that radio links may be set over 2________________ of 100 million kilometers or even more.
Now we cannot imagine our life without electronics.
But it all began with the 3_______________ of radio. It was our Russian scientist A.S. Popov who discovered the principles of wireless communication that finally led to the development of 4________________ tubes for use in various communication devices.

A group of frequencies in the VHF radio spectrum allocated to radio communication in civil aviation is called an …

Ground-penetrating radar uses _____ to image the subsurface.

The electrons of an atom are bound to the nucleus by the ______ force.

According to Faraday's law of induction to produce an electromotive force a magnetic field _______ an electric circuit.

Matter in the plasma _______ has variable volume and shape, but as well as neutral atoms, it contains a significant number of ions and electrons.