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
Ecological anthropology to study a wide range of human responses to environmental problems. In the 1960s, ecological anthropology first appeared as a response to cultural ecology, a sub-field of anthropology led by Julian Steward. Steward focused on studying different modes of subsistence as methods of energy transfer and then analyzed how they determine other aspects of culture. Culture became the unit of analysis. The first ecological anthropologists explored the idea that humans as ecological populations should be the unit of analysis, and culture became the means by which that population alters and adapts to the environment. It was characterised by systems theory,