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Color, Intro to Mirrors and Lenses

Color, Intro to Mirrors and Lenses. A note on Dispersion…. White light is light composed of light of many wavelengths, forming a spectrum When white light is sent through a prism, the light refracts Different frequencies are slowed more than others, thus they bend more than others.

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Color, Intro to Mirrors and Lenses

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  1. Color, Intro to Mirrors and Lenses

  2. A note on Dispersion… • White light is light composed of light of many wavelengths, forming a spectrum • When white light is sent through a prism, the light refracts • Different frequencies are slowed more than others, thus they bend more than others.

  3. Color for Humans Rods (light/no light) Cones (sensitive to different frequencies)

  4. Light

  5. Dyes and Printing

  6. In Summary…

  7. Plane Mirror • Plane = flat

  8. The Law of Reflection: Ѳi = Ѳf

  9. Spherical Mirrors • Part of Spheres • Concave (“cave”) • Convex

  10. Concave Mirrors

  11. Convex Mirrors

  12. Lenses

  13. Image Distortion • Made larger or smaller = magnified • Right side up or upside down = upright or inverted

  14. Focal Point for Lenses

  15. Focal Point for Lenses • http://www.katu.com/news/local/Snow-globe-responsible-for-unusual-fire-143567556.html?tab=video&c=y

  16. Focal Point for Mirrors

  17. Focal Point SummaryLenses Mirrors

  18. Ray Diagrams (more later)

  19. Today: • What do you see looking in the convex mirror? • What do you see looking in the concave mirror?

  20. Today… • Find the focal length of your convex lens:____ • Look through each of your concave lenses at a distant object, and at a close object. Write what you see in terms of image size, and upright or inverted?

  21. Today… • Choose One of the reflection problems and work it. Remember, 180 degrees in a straight line, and 90 degrees in a right angle.

  22. Today… On the worksheet provided, use the law of reflection, θi = θr to show how the light bounces off a concave, and off a convex mirror. Your picture should look somewhat like this:

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