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Understanding Light: Properties, Behavior, and Color Theory

This educational resource explores the fundamental concepts of light, including luminous and illuminated objects, the behavior of light when it interacts with different materials, and the color spectrum. Learn about reflection, transparency, and translucency, as well as how the speed of light varies in different media. The guide also covers color theory, including the R.O.Y.G.B.I.V. spectrum, complementary colors, and the differences between white and black light, including the unique characteristics of laser light.

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Understanding Light: Properties, Behavior, and Color Theory

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  1. Light Notes 2 Light, Luminous & Illuminated

  2. Luminous Used to describe an object that • Luminous – _____________________________ ________________________________________ Ex:____________________________________ can be seen because it emits light. Sun, flashlight, light bulb

  3. Illuminated Used to describe an object • Illuminated – _______________________ __________________________________ Ex:________ that can be seen because it reflects light. mirror

  4. 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

  5. Transparent vs. Translucent • Transparent- materials that ________light easily. • Ex: ____________________ • Translucent- materials that transmits ______light • Ex:____________________ transmit clear glass, air some stained glass, wax paper

  6. 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

  7. 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.

  8. 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:

  9. 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

  10. White Paper; Black Paper R O Y G B I V White Paper Black Paper

  11. 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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