Broadcasting is the distribution of audio or video content to a dispersed audience via any electronic mass communications medium, but typically one using the electromagnetic spectrum (radio waves), in a one-to-many model. Over the air broadcasting is usually associated with radio and television, though more recently, both radio and television transmissions have begun to be distributed by cable.[1]
Coverage[]
Broadcast signals are featured in the Life After People Documentary in 10,000 years after people.
The documentary stated that scientists once predicted that human history and culture would live on through radio and television broadcasts that can carry on through the universe towards the infinite, to be tuned in by an intelligent species on a distant planet. David Brin stated that while some people think there's an expanding shell of radio and television from earth, expanding outward alerting the universe, however recent calculations by SETI, Search for Extraterrestrial Intelligence Group, shown that all of the broadcast signals would dissipates within one and two light years into noise.
The documentary concludes that if this is true, the signals won't even make it out to the nearest star beyond the sun, let alone the galaxies.