28.1 The Color Spectrum ­ 28.5 Mixing Colored Light (2).notebook
Color
• spectrum ­ spread of colors
• white light ­ combination of all colors
• black ­ not a color, absence of light
The color of a transparent object is the color of the light it transmits
• pigment ­ material in glass that selectively absorbs colored light April 19, 2017
By passing a narrow beam of sunlight through a triangular ­ shaped glass prism, Newton showed that the sunlight is composed of a mixture of all the colors of a rainbow
• color of an opaque object is the color of the light it reflects
• different materials have different natural frequencies for absorbing and emitting radiation
> red ­ absorbs light and reflects red
• light sources also effects apparent coloring
> depending on the frequencies of light produced
yellow green is the brightest part of sunlight
28.1 The Color Spectrum ­ 28.5 Mixing Colored Light (2).notebook
• can make almost any color by overlapping red, green, and blue light and adjusting the brightness of each
• additive primary colors ­ Red, Blue, Green
April 19, 2017
https://www.youtube.com/watch?v=LCs8mK1rzc0&t=5s