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
Moving to Opportunity Moving to Opportunity Moving to Opportunity for Fair Housing (MTO) was a randomized social experiment sponsored by the United States Department of Housing and Urban Development (HUD) in the 1990s among 6969 low-income families with children living in high-poverty public housing projects. Families who volunteered to participate in the program were randomly assigned to 3 groups. One group received housing vouchers that could be used only in low-poverty areas for the first year as well as counseling to help them find units there. After a year, they could use their vouchers anywhere. One group received vouchers that could be used