what are the three primary colors of television
Color television was demonstrated by John Baird as early as 1928, and a year later by Bell Telephone Laboratories. Experimental color broadcasting was initiated in 1940, when the Columbia Broadcasting System (CBS) publicly demonstrated a field sequential color television broadcasting system. This system employed successive fields scanned one at a time in one of the three primary colors; red, blue, or green. On the receiver end, a mechanical color wheel was used to reconstitute the primary colors in sequence to enable reproduction of the colors in the original scene.