Huec2032Final - TaylorWrightHUEC2032Final Chapter 7 Light

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Taylor Wright- HUEC 2032 Final  Chapter 7       Light The electromagnetic energy making things visible, the radiant energy resulting from vibrations of electrons Can be manipulated by controlling the surface it falls on Visual Effects of Light Rays Wavelength Frequency Brightness Wavelength Measured in nanometers (one billionth of a meter) Visible Light Shorter or longer, do not stimulate eye receptors-darkness Divided into color by wavelength -Red: longest wavelength, slowest frequency -Violet: shortest wavelength, fastest frequency Frequency How fast the wave vibrates Red-slowest Violet-fastest Color Spectrum A visual phenomenon that seperates white or balanced light into individual wavelengths of visible energy, so the eye can distinguish b/t  them White perfectly balanced colors in light Color Blind -eyes see only graduations of gray or some colors & gray -only rods (light receptors) are functioning -cones are color receptors Scotopic: night vision (only rods) Photopic: daytime vision (needs light, rods not working) Brightness Level of illumination Depends on amount of energy radiated More energy => brighter the light Visual Effects of Light Direct -natural or artificial sources Reflected -everything else we see -reflected from a surface Color An imbalance of visible radiant energy reaching the eye from light sources & objects
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Imbalance -Average deviation from average amount of energy at all wavelengths Seeing Colors in Object **Without light there can be NO color** -colors are names to describe various mixtures of electromagnetic energy Color Constancy -objects constantly reflect or transmit light waves only in a particular, narrow color range while absorbing all others Textures React to Light Reflects Absorbs (black) Admits (transparent) More light bounces off light colors, reverse side stays cooler Dark colors absorb more light, transform to heat All color perception depends on LIGHT as a source of color Light is the surface-color the effect “White”: all colors of visible spectrum Selective Absorption -the process where a pigmented surface absorbs all light rays except those of color visible to the eye White-all light rays reflected Black-all light rays absorbed Chapter 8 Color
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This note was uploaded on 06/13/2011 for the course HUEC 2045 taught by Professor V during the Spring '06 term at LSU.

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Huec2032Final - TaylorWrightHUEC2032Final Chapter 7 Light

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