19. By what means do Frank and John communicate over a significant time span, in the film "Frequency"?
From Quiz Frequency
Answer:
ham radio
"Frequency" as a film title has a double meaning, with one being the frequency of the ham radio signal used by the father, then years later by the son, intersecting in time so they can speak to one another. The other meaning is the frequency of the scientific phenomena creating the opportunity for this time-warpy thing to occur. It is a really scientifically sophisticated notion by screenwriter Toby Emmerich, otherwise an accomplished Executive Producer of an impressive number of films, including "The Notebook," "A History of Violence," "Wedding Crashers," and "Sex in the City 2". His idea: Instead of people traveling through time, voices do. In what would be majorly weird and trippy if it really happened, John the adult gets to talk to "Little Johnny" -- himself -- over the radio.