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huec 2032 final

huec 2032 final - HUEC 2032 Final Exam Review Chapters 7 8...

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HUEC 2032 Final Exam Review Chapters 7, 8, 9, 10, 18, 21, 25, 26 100 points True/False Multiple Choice Matching Color Wheel, Value/Intensity Changes, Design Principles Chapter 7 – Light Definition -electromagnetic energy making things visible, the radiant energy resulting from vibration of electrons; energy source stimulus and visual perception response 3 Factors – wavelength, frequency, brightness - wavelength : is the distance between the highest point of one wave and the highest point of the next. - frequency : number of wavelengths passing a point per second. Frequencies for visible portion of the spectrum are too fast for real human comprehension; longest visible wavelength, red, has the slowest frequency; and the shortest wavelength, violet, has the fastest or highest frequency. - level of illumination OR brightness : depends on the amount of energy radiated—the more energy, the brighter the light which comes “packaged” in the units called photons. Nature of color -without light, no visual perception colors we see depends on the colors in light rays themselves, pigmentation of surface to absorb or reflect light rays - color: an imbalance or visible radiant energy reaching the eye from light sources and objects - imbalance : average deviation from average amount of energy at all wavelengths - seeing color in object: without light there can be no color; colors are names to describe various mixtures of electromagnetic energy - color constancy : object consistency reflected of transmit light waves only in particular, narrow color range while absorbing all others 3 ways textures react to light -depends on: sharpness/diffusion, angle and amount emitted by light source, surface quality/thickness of texture -reflects -absorbs -admits
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White & colored light -all color perception depends on light as a source of color -light is the surface—color is the effect -balanced: all wavelengths reflected -unbalanced- colors of stronger wavelengths appear brighter, weaker wavelengths duller -“white”: all color of visible spectrum; striking surface react in 2 ways 1. bounce off as unchanged white light as in highlights reflected from shiny metals, mirrors, lustrous satin, shimmering water 2. white light might slightly penetrate surface, surface pigment then absorbs all color wavelengths except one reflected to the eye. The color that reflected wavelengths is color we see (can see colors NOT absorbed in pigment) -white—all light rays reflected -black—all light rays absorbed -colored light: contains only one of few colors of wavelengths, surface pigment can reflect only the colors in the light wavelengths that strikes it and cannot be absorbed; if strikes white surface there is no pigment to absorb the light rays, so white reflects whatever light rays it receives Selective absorption -the process where a pigmented surface absorbs all light rays except those of color visible to the eye -brightness of surface colors, lightness and dark of a color, and color distortion How the eye sees color -level of illumination and color
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