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 Brazil Judo at the 2012 Summer Games, signifying the continued vitality of the martial art in Brazil. Mitsuyo Maeda introduced Judo to Brazil in November of 1914. Maeda was a member of the Kodokan, and one of five of Judo’s top groundwork experts. Judo founder, Kanō Jigorō sent Maeda as something of an ambassador to broaden Judo practice on a worldwide level. Maeda introduced Judo, (designated ‘Kano Jiu-Jitsu’ in that period) to Carlos Gracie, the first of several in his family that would take up the sport and eventually mold it into Brazilian Jiu-Jitsu, sometimes referred to as Gracie Jiu-Jitsu. After