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
SCALE-UP boards nearby. Each team has a laptop in case they need web access. The original design called for 11 round tables of nine students, but many schools have smaller classes while a few have even larger ones. Smaller classes, particularly those in high schools, have also been using D-shaped tables that seat six students. SCALE-UP SCALE-UP is a learning environment specifically created to facilitate active, collaborative learning in a studio-like setting. Some people think the rooms look more like restaurants than classrooms. The spaces are carefully designed to facilitate interactions between teams of students who work on short, interesting tasks.