When were radio plays invented?

It's difficult to pinpoint an exact date for the invention of radio plays, as it was a gradual evolution. Here's a breakdown of the key milestones:

* Early 1900s: Radio technology was in its infancy, and early experiments with voice transmission were happening.

* 1920s: Broadcasting emerged, and early radio programs featured spoken word elements.

* 1922: "The Queen's Messenger," a 15-minute play by Austin Strong, is considered the first true radio play in the United States.

* 1923: The BBC in the UK began broadcasting regular radio plays.

* 1920s-1930s: Radio plays flourished as a popular form of entertainment, with genres like sci-fi, drama, comedy, and mysteries gaining popularity.

So, while "The Queen's Messenger" in 1922 marks a significant event, it's important to recognize that the development of radio plays was a continuous process throughout the 1920s and 1930s.