Color reflected color depends upon the viewing angle. Numerous scientists have carried out research in butterfly wings and beetle shells, including Isaac Newton and Robert Hooke. Since 1942, electron micrography has been used, advancing the development of products that exploit structural color, such as "photonic" cosmetics. Color Color (American English), or colour (Commonwealth English), is the characteristic of human visual perception described through color "categories", with names such as red, orange, yellow, green, blue, or purple. This perception of color derives from the stimulation of cone cells in the human eye by electromagnetic radiation in the visible spectrum. Color categories and
Judo in Canada an episode titled "J is for Judo" which featured journalist and judoka Frank Moritsugu instructing host Mavis Kerr in the basics of Judo, and in 1976 The National Film Board of Canada produced a seven-minute 'sport interlude' titled "Capsule – Judo" that was shown on television as part of the coverage leading up to and during the Montreal Olympics. The most common television coverage of Judo in Canada, however, is interviews conducted with Olympic athletes, particularly after a medal has been won, along with short athlete profiles that are interspersed throughout coverage of the Games. One such profile, shown during