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Objective 11/05/2012 Page 56. SWBAT apply the properties of light to the colors we see through notes and diagrams. . Jumpstart . Compare and contrast sound waves and light waves. How are they similar? How are they different?. Different.

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Jumpstart

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  1. Objective 11/05/2012 Page 56 SWBAT apply the properties of light to the colors we see through notes and diagrams. Jumpstart Compare and contrast sound waves and light waves. How are they similar? How are they different?

  2. Different Jumpstart: Friday 11/16/2012Compare and contrast sound waves and light waves. How are they similar? How are they different? similar Light and sound travel in waves They carry energy Perceived by senses Assist in improved communication and navigation Light waves are transverse waves, while sound waves are longitudinal waves Particles move in different ways Light waves do not need a medium to travel through, while sound waves do Light waves travel faster than sound waves (light waves travel 300 million m/s, while sound waves travel only 330 m/s) You use different senses to allow you to detect them

  3. The Colors We See Packet Page 4

  4. Page 2 Transparent Transparentmaterials are those that transmit nearly all light through them (allow light to pass through) You can see objects clearly on the other side of a transparent object; no distortion Ex. Windshield glass, air, saran wrap

  5. Translucent materials are those that allow some light to pass through them, while the rest of the light is reflected off of the surface of the object Light is scattered, so you may see the object through the material, but not clearly. Ex. Frosted glass, wax paper Translucent

  6. Opaqueobjects are those that do not allow any light rays to pass through them; they reflect or absorb all light that strikes it You cannot see through them Most objects are opaque Ex. Wood, metal, wool, cotton Opaque

  7. The Colors We See • The COLORthat an object appears, is the COLOR of the light that it reflects

  8. All colors absorbed • White light from the sun is actually made up of a mixture of colors (ROY G BIV) • When light wave from all colors enter the eye at the same time, the brain interprets the color as being white • Watch- They Might Be Giants- ROY G BIV Black Page 4- In White Light... • Parts of objects absorb some wavelengths of light and reflectall others • The color black • all colors are absorbed • no colors are reflected • The color white • all colors are reflected • no colors are absorbed White All colors reflected

  9. Red Seeing Color The Color Red Reflects: RED Absorbs: Orange, yellow, green, blue, violet Yellow Blue The Color Yellow Reflects: YELLOW Absorbs: Red, orange, green, blue, violet The Color Blue Reflects: BLUE Absorbs: Red, orange, yellow, green, violet

  10. What wavelengths are being reflected from and absorbed into these balloons?

  11. Page 4- In Colored Light... • Objects seen through filters • Color filters only allow certain colors to pass through them, absorbing or reflecting the rest • A red filter only allows red light to pass. • Objects can appear different colors depending on the color of light in which they are seen • Ex: Water at sunset

  12. Think back to your elementary school art classes to help you answer the following questions! • What three colors can you use to make any other color? • Red, Yellow,Blue • What are these three colors called? • Primary Colors(def.) - Three colors that can be used to make any other color • What color combinations can you think of? • Red+Yellow=Orange • Blue+Yellow=Green • Red+Blue= Purple

  13. Primary Light Colors • Primary Light Colors– Red, green, and blue colors, which when combined in equal amounts, produce white light • Secondary Light Colors– a color produced by two primary colors • RED + GREEN = YELLOW • RED + BLUE = MAGENTA • BLUE + GREEN = CYAN • RED + GREEN + BLUE = WHITE • Did You Know? Television, phone, and computer screen pictures are made up of only red, green and blue lights so the images are all produced by varying the amounts of each color that is shown

  14. Primary Pigment Colors • Pigments– opaque substances that reflect particular colors; substances used to color other materials • Primary Pigment Colors – magenta, yellow, cyancolors, which when combined in equal amounts, produce the color black • Think of your printer cartridge  • Secondary Pigment Colors: The color you see is the color of light that particular pigment reflects • CYAN + YELLOW = GREEN • CYAN + MAGENTA= BLUE • YELLOW + MAGENTA = RED • CYAN + YELLOW+ MAGENTA = BLACK • Artists create different shades of colors using paints and dyes of both primary and secondary pigments • Colors in print are all made up of various combos of magenta, yellow and cyan

  15. How we see...reflected light • 3.8- THE STUDENT WILL EXPLAIN THAT AN OBJECT IS SEEN WHEN LIGHT REFLECTED FROM AN OBJECT ENTERS THE EYE. [P8C1] Page 4 • Rays of light usually travel in straight lines until they hit something • You can see objects because light reflects or bounces off of them. • What you see depends on how surface light is reflected from an object. • The light that reflects off the surface of an object must reach our eyes in order for us to see it Page 5 • Color the fruit • Red apple, yellow banana, purple grapes, green pear • Color the arrow from the fruit in the color that is reflected!

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