Planet earth: radio waves [B&W]

United States, 1960

Film
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Discusses the electromagnetic spectrum, the history of its discovery, the theory and research done on radio waves and the ionosphere which girdles the earth. Explains the ionosphere, how it is explored and used for radio communications, and the new science of radio-astronomy which is probing far beyond our galaxy.

Credits

producer

Lothar Wolff

production company

National Academy of Sciences (U.S.)

Language

English

Duration

00:26:27:00

Colour

Black and White

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