physics 28
pigment
a material that selectively absorbs colored light
Line spectrum
a pattern of distinct lines of color, corresponding to particular wavelengths, that are seen in a spectroscope when a hot gas is viewed
scattering
a process in which sound or light is absorbed and re-emitted in all directions
excited state
a state with greater energy that an atom's lowest state
spectroscope
an instrument used to separate the light from hot gas or other light source into its constituent frequencies
Spectrum
for sunlight and other white light, the spread of colors seen when the light is passed through a prism or diffraction grating. In general, the spread of radiation by frequency, so that each frequency appears at a different position.
White Light
light, such as sunlight, that is a combination of all the colors. Under white light, white objects appear white and colored objects appear in their individual colors.
additive primary colors
red, blue, and green light. These colors when added together produce white light
subtractive primary colors
the colors magenta, yellow, and cyan. These are the three colors most useful in color mixing by subtraction
complementary colors
two colors of light beams that when added together appear white