Due to the first strong commercial radio stations, our radio presence has now extended out to approximately 70 light-years.

Question

Quizplus · Accepted Answer

The first commercial radio broadcasts began in the early 20th century, around the 1920s. Since radio waves travel at the speed of light, our earliest broadcasts have reached a distance of approximately 70 light-years from Earth, expanding our radio presence into space.

Due to the First Strong Commercial Radio Stations, Our Radio