color key terms

visible spectrum

range on electromagnetic spectrum between infrared and ultraviolet

prism

triangular piece of glass used to separate while light into its component colors

black

absence of light

diffraction grating

material containing many parallel lines very closely spaced used to separate colors of light due to the interference; acts a multiple slits that cause overlapping diffraction

spectroscope

device containing a diffraction grating used to analyze the spectrum of materials

primary color of light

average colors of sunlight or white light; colors of light that when added. together produce white light; red, green, and blue

secondary color of light

result of adding any two primary colors of light; color of light, that when added to its primary color of light, produces white light; yellow, cyan, and magenta

color wheel of light

used to show how various colors of light are created

color by addition

process used to determine the resultant color of combined light; the adding of colored light

selective reflection

opaque objects reflect the color seen and absorb all other colors

selective transmission

transparent objects transmit the color seen and absorb all other colors

pigment

materials that selectively absorb colored light; some reemit absorbed light, like neon and fluorescent paint; most pigments are dyes, paints, or ink

primary color of pigment

base colors of all pigments; colors of a pigment that when mixed produce black pigment; yellow, magenta, and cyan

secondary color of pigment

result of mixing any two primary color of pigment; pigment, that when added to its primary pigment, produced black pigment; red, blue, and green

color of wheel of pigment

used to show how various colors of pigment are created

color by subtraction

process used to determine the resultant color of combined pigments; the subtraction of pigments

scattering

the reflection of light in the air

ROY G BIV

acronym for the colors of the visible spectrum

red, orange, yellow, green, blue, indigo, and violet