The popularity of the television expanded rapidly beginning in what 20th century decade

The 1950's

Explanation: Television is considered to be the media, which has most affected the shaping of people's lives during the 1950's. Immediately after the WWII it was the privilege of only a small number of rich people, that in only ten years, two-thirds of American households would have television. Television has contributed to the development of popular culture. It also influenced the change of politics, and the appearance of advertisements, especially for the purpose of political campaigns, television was a powerful means of propaganda.

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