
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.
- Year: 1932
- Country: Germany
- Genre: Documentary
- Studio: Commerz-Film AG (Berlin)
- Keyword:
- Director: Hans Fritz Wilhelm
- Cast: Rolf Gert, Alfred Stratmann