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
Israel Judo Association Israel Judo Association The Israel Judo Association (איגוד הג'ודו בישראל) is a sports association in Israel, and its headquarters is located in Tel Aviv, Israel. The Association operates Israel's national judo teams, holds the Israeli Judo Championships for different age classifications, and offers courses and seminars for instructors, coaches, and referees. It is a member of the European Judo Union. The Israel Judo Association was established in 1965. Amos Greenspan, a second dan, was Chairman of the Association in the early 1970s. At that time, the Association did not easily recognize belts earned overseas, as it sought to maintain very