Unsichtbare Brücken

In the broadcasting center of a radio station, visitors are informed in a kind of educational course about how "electric waves" are generated and how they are converted into sounds that can then be heard on the radio.

Country:

Germany

Genre:

Documentary

Duration:

40 minutes

Year:

1932

Director:

Hans Fritz Wilhelm

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Company:

Commerz-Film AG (Berlin)

Cast:

Crew:

Director

Music

Director of Photography