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Light Notes 2. Light, Luminous & Illuminated. Luminous. Used to describe an object that. Luminous – _____________________________ ________________________________________ Ex:____________________________________. can be seen because it emits light. Sun, flashlight, light bulb.
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Light Notes 2 Light, Luminous & Illuminated
Luminous Used to describe an object that • Luminous – _____________________________ ________________________________________ Ex:____________________________________ can be seen because it emits light. Sun, flashlight, light bulb
Illuminated Used to describe an object • Illuminated – _______________________ __________________________________ Ex:________ that can be seen because it reflects light. mirror
reflected absorbed transmitted • When light hits something it can be _________, ____________ or _____________. • Reflection- light _____________ off a material. • Opaque materials _______ or _______ light. • They block the light. Examples: ____________________________ • Shadow- formed when an object ________ light. bouncing reflect absorb mirror, paper, floor, you blocks
Transparent vs. Translucent • Transparent- materials that ________light easily. • Ex: ____________________ • Translucent- materials that transmits ______light • Ex:____________________ transmit clear glass, air some stained glass, wax paper
Speed of Light 300,000 • Speed of light is about _________ km/sec. • Speed depends on _________ traveled in. • When light travels from a denser material to a less dense material _________________ • Ex: ____________ • When light travels from a less dense material to a denser material _________________ • Ex: ____________________________ vacuum medium speed increases water to air speed decreases air to water
Color wavelength • Color- determined by ________________. • The color of an object _______________________. R O Y G B I V is the color of light it reflects Spectrum: An array of colors like from a rainbow or prism.
Color Wheel & Colored Images Printing Color Images uses the colors….. ____________, __________ ____________ & __________ yellow cyan magenta black Complimentary Colors: 2 colors of light mixed to give WHITE red blue Ex: Magenta & Green; Yellow & _________; Cyan & ______ Addition: Process of color formation when mixing light. Light being reflected in many directions. It’s why the sky is blue! Scattering:
White & Black Light • White light – _________ wavelengths, • _________________ • * not a color _________________________ • Black light – ____ wavelengths, • ________________ • * not a color ___________________________ many incoherent light all color wavelengths being reflected no light absorbed all color wavelengths being absorbed
White Paper; Black Paper R O Y G B I V White Paper Black Paper
Laser Light one one color • Laser light – _______ wavelength, so ________. • It is _______________. • Can travel for _______ distances. • Ex: _________________________ coherent light long laser eye surgery, supermarkets
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