Light & ColorColor for Opaque Objects Why does an apple look red and a leaf green? When white light strikes the surface of the apple, only red light is reflected. All the other colors are absorbed. Your eyes only see the red light, so you say the apple is red. The leaf appears green because only green light is reflected from the leaf. White objects reflect all the colors of light. Black objects absorb all the colors of light. A black t-shirt gets hot in the Sun because the black material absorbs all the energy of the light which is converted to heat.Transparent or Translucent Objects A color filter is a transparent or translucent material such as the lenses of your sunglasses. An object can appear to be a different color than it actually is if it is viewed through a color filter. For example, a red apple normally appears red because it reflects red light. However, when this red apple is viewed through a green filter, the red light is absorbed and the red apple will now appear black. Its green leaf will still look green because the green light can pass through the lens.redgreenbluemagentayellowcyanwhiteAdditive Color SystemSubtractive Color Systemwhite lightyellowcyanmagentayellowcyanmagentaredgreenblueblackredgreenbluemagentayellowcyanwhiteColors of PigmentsThe primary colors of pigments are magenta, yellow, and cyan. Any of these two primary pigments can be combined to produce a secondary pigment color. For example, magenta and cyan when combined make blue. However, when the three primary colors are combined in equal amounts, all the colors of light are absorbed resulting in a black pigment. The colors you see on a printed image are produced by combining different color pigments.secondary colorsprimary colorsprimary colorssecondary colorsVisible LightYour eyes are tuned to see a very small portion of the electromagnetic spectrum which scientists call visible light. Visible light waves have wavelengths in the range of 400 nm to 700 nm. These wavelengths are seen by humans as different colors. The longest wavelength, 700 nm, is seen as red light, while the shortest wavelength of 400 nm is seen as violet light. This range of colors which humans can see is called the visible spectrum.1 2 34 5 67 8 901+--+234567890radioradiowaveswaves microwavesX-raysultravioletinfraredinfraregammarays98 07 98765 4 32 1 2:1332 78 90+++--+1234567890700 nm red light400 nm violet lightwhite lightcolor lightdispersionVisible Light© Copyright NewPath Learning. All Rights Reserved. 94-4479Visit www.newpathlearning.com for Online Learning Resources.Combining Colors of LightPrimary colors of light ­ blue, green and red combine to produce white light. Secondary colors of light are produced by combining two different primary colors known as color addition. For example, red and blue combine to produce magenta, red and green produce yellow, while green and blue produce cyan. The colors that you see on your television or computer are produced by color addition.yellowcyanmagentayellowcyanmagentaredgreenblueblack
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