12. Radio soap operas got their name because they were often sponsored by makers of soap
products.
13. Early radio inventors like Marconi focused on ship-to-shore communication.
14. The invention of the transistor in the late 1940s made radio more accessible and portable than
ever.
15. The Wireless Ship Act of 1910 resulted from the sinking of the Titanic.
16. Internet radio stations are those that stream or simulcast a version of their on-air signal over the
Web or that create a station exclusive to the Internet.
17. The period of the 1920s through the 1940s was marked by a proliferation of informative and
entertaining radio programs.
18. The Radio Act of 1927 created the Radio Corporation of America.
19. AM radio is superior to FM radio for broadcasting music.
20. The first person to discover and develop FM radio in the 1920s and the 1930s was David
Sarnoff of RCA.
21. The aim of networks such as CBS and NBC was to serve the public interest.
22. The radio industry transformed its business model in the 1950s because of television.
23. In the 1940s, NBC sold its Blue network, which then became CBS.