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Light and Color


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Light and Color

  1. 1. Light, Mirrors, and Lenses Chapter 4
  2. 2. Properties of Light Section 1
  3. 3. <ul><li>Light is a wave that carries energy; a light source emits a countless number of light rays that travel in all directions. </li></ul>
  4. 4. Properties of Light <ul><li>The material through which a wave travels is called a medium . </li></ul><ul><li>Light is an electromagnetic wave that does not need a medium in which to travel. </li></ul>
  5. 5. <ul><li>For the eyes to see an object, light must strike the object and bounce off, a process called reflection . </li></ul><ul><li>Materials that let no light pass through them are opaque . </li></ul>
  6. 6. <ul><li>Transparent materials let almost all light pass through them. </li></ul>
  7. 7. <ul><li>Materials that let some, but not all, light pass through them are translucent . </li></ul>
  8. 8. <ul><li>White light is composed of different wavelengths , which have colors ranging from red to violet. </li></ul><ul><li>Objects appear to have color because they absorb some light waves and reflect others; an object appears the color of the light it reflects. </li></ul>
  9. 9. <ul><li>Light colors: the color you see is the color your eye interprets from the mixture of red, blue, or green light. </li></ul><ul><li>The primary colors of light are red, blue, and green. </li></ul>
  10. 10. <ul><li>Pigments are colors you see in objects – paint, markers, dyes, etc. (Color Wheel) </li></ul><ul><li>Pigment colors: the color you see is the color your eye interprets from waves reflected from the pigment. </li></ul><ul><li>The primary pigment colors are yellow, magenta, and cyan. </li></ul>
  11. 11. Madame X by John Singer Sergeant Painting with Primary Colors
  12. 12. Light vs. Pigment