Unsichtbare Brücken (1932)

Release Date: 1932-08-18
Runtime: 0h 40min
Production Company: Commerz-Film AG (Berlin)
Production Country: Germany
Director: <a itemprop="url" href="https://www.cinebymovies.com/actor/1050784/hans-fritz-wilhelm"> Hans Fritz Wilhelm

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.