Color The science of color is sometimes called chromatics, colorimetry, or simply color science. It includes the study of the perception of color by the human eye and brain, the origin of color in materials, color theory in art, and the physics of electromagnetic radiation in the visible range (that is, what is commonly referred to simply as "light"). Electromagnetic radiation is characterized by its wavelength (or frequency) and its intensity. When the wavelength is within the visible spectrum (the range of wavelengths humans can perceive, approximately from 390 nm to 700 nm), it is known as "visible light". Most light
What the World Needs Now Is Love assassination, and Martin Luther King, Jr., and soundbites of news coverage of each assassination. The ending of the song is a reprise of the introduction. "What the World Needs Now is Love/Abraham, Martin and John" rose to No. 8 on the "Billboard" Hot 100 in August 1971, and was Clay's only Top 40 hit. "What the World Needs Now is Love" has been used in many film soundtracks, notably "Bob & Carol & Ted & Alice" and "For the Love of Fred" (used as the film's closing theme song in both), "", "My Best Friend's Wedding", "", "The Boss Baby",