For decades tennis balls were black or white, chosen against the background color of the court, and that worked perfectly well for anybody sitting in the stands. Then the audience moved to the living room and the television set turned color. What did that change?
The ball changed color for the camera. Research had shown that yellow balls were more visible to television viewers, and in 1972 the International Tennis Federation introduced into . kept its traditional white rather longer, and adopted yellow only in 1986. What now looks like the natural color of the sport is a broadcasting decision.
Tennis balls have always been built on rubber, and their color was a practical matter. Historically they were either black or white, picked against the background color of the court, and in the stands either worked.
Television changed the viewer. A broadcast resolves less detail than the eye and the ball moves across the frame in a fraction of a second, so that is adequate in person can be lost entirely on a screen.
Research showed that yellow balls were more visible to television viewers, and in 1972 the International Tennis Federation wrote them into the rules of tennis. The choice of that particular yellow is not arbitrary either, since human vision is at its most sensitive in roughly that range.
Adoption was not instant. Wimbledon stayed with the traditional white until 1986, fourteen years after the rule changed. The result is a nice inversion: a color introduced to serve a camera now looks like the inherent color of the game, and the white ball looks like a costume.
wat. Yellow entered the rules of tennis in 1972 so that viewers could follow the ball on a color television.
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A design decision taken for the viewer at home became the thing everyone pictures when they picture tennis, which is how most traditions are actually made.
How do we know?
The official history of tennis balls published by the International Tennis Federation records the 1972 rule change, the television reasoning behind it, and the later switch at Wimbledon.
What is still unknown
The source documents a governing body’s decision and its institutional history rather than a published experiment, so the visibility research behind the rule is described rather than shown.
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