 Not in things themselves  Provoked by the frequencies of light emitted or reflected by things

 Studied colors created by passing sunlight through a prism

 White Light  under which white objects appear white and colored objects appear in their individual colors ie: Sunlight  White is the combination of all of the colors of light, but not a color itself  Black is also not a color, but instead the absence of light

 Due to the way the objects reflect light  As light strikes an object the electrons in the object are forced into vibrations  Once vibrating these electrons send out their own energy waves in all directions

 If the vibrations are at resonant frequencies  light is absorbed  If the vibrations are above or below resonant frequency  light is re-emitted or passes back into the medium from which it came (reflection)  Objects can only reflect frequencies of light which are present in the illuminating light

 Brighter in mid-frequency yellow & green regions  Higher and Lower frequencies are less bright  Reason yellow and bright red vehicles stand out

 Red  low frequency  Green  middle frequency  Blue  high frequency  Red + Green + Blue  White  Any color can be made by overlapping these three colors and adjusting the brightness of each

 Red + Blue  Magenta  Red + Green  Yellow  Blue + Green  Cyan

 Any two colors of light that when added together produce white light  Blue + Yellow  White  Red + Cyan  White  Green + Magenta  White

 Mixing pigments or dyes does not produce the same effect as mixing colored light  Are materials that selectively absorb colored light

 Scattering of light by the particles in our atmosphere causes the particles to vibrate  During the day light takes a shorter path through the atmosphere causing the particles to vibrate at a higher frequency

 During sunrise and sunset the light from the sun takes a longer path through the atmosphere  This now causes the scattered light to vibrate at a lower frequency