Reflection and Mirrors

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This PowerPoint introduces students to the idea of light reflection. Included in this presentation you will find several diagrams that show how light is reflection in concave and convex mirrors.

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Reflection and Mirrors

  1. 1. Reflection and Mirrors Pages 548-551
  2. 2. What you will learn… <ul><li>Types of reflection </li></ul><ul><li>How to use mirrors for image quality </li></ul><ul><li>I can predict the path of reflected light from flat, curved, or rough surfaces </li></ul><ul><li>I can explain why the ground gets warm during the day </li></ul><ul><li>I can draw ray diagrams to indicate how light reflects off objects or refracts into transparent media </li></ul>
  3. 3. When Light Strikes an Object <ul><li>Three options </li></ul><ul><ul><li>Reflected, absorbed, or transmitted </li></ul></ul><ul><li>Most objects reflect or absorb </li></ul><ul><ul><li>Opaque—a material that reflects or absorbs all of the light that strikes it </li></ul></ul><ul><ul><ul><li>Wood, metal, cotton </li></ul></ul></ul>
  4. 4. Transparent <ul><li>Objects that transmit light </li></ul><ul><ul><li>Clear glass, water, & air </li></ul></ul>
  5. 5. Translucent <ul><li>Materials that allow some light to pass through </li></ul>
  6. 6. Translucent, Transparent, or Opaque
  7. 7. Translucent, Transparent, or Opaque
  8. 8. Translucent, Transparent, or Opaque
  9. 9. Translucent, Transparent, or Opaque
  10. 10. Reflection <ul><li>You can see most objects because light reflects, or bounces, off them. </li></ul>
  11. 11. Regular Reflection <ul><li>Angle of Reflection = Angle of Incidence </li></ul>
  12. 12. Diffuse Reflection <ul><li>When parallel rays of light hit a bumpy, or uneven surface </li></ul><ul><ul><li>Most objects reflect this way </li></ul></ul>
  13. 13. Mirrors <ul><li>Sheet of glass that has a smooth, silver-colored coating on one side. </li></ul>
  14. 14. Plane Mirrors <ul><li>Produces an image that is right-side up and the same size as the object being reflected </li></ul><ul><li>Image is called “virtual image” </li></ul>
  15. 15. Concave Mirrors <ul><li>Mirror with a surface that curves inward </li></ul><ul><li>Type of image depends on position </li></ul>
  16. 16. Convex Mirrors <ul><li>Mirror with a surface curved outward </li></ul>
  17. 17. Questions <ul><li>1. Complete this diagram in your notes </li></ul>
  18. 18. Questions <ul><li>2. Complete the ray diagram for this concave mirror </li></ul>
  19. 19. Questions <ul><li>Complete the ray diagram for the following convex mirror </li></ul>
  20. 20. Questions <ul><li>Why does the ground become warm during the day? </li></ul>
  21. 21. Questions <ul><li>Explain the difference between a regular reflection and diffuse reflection. Draw a diagram that supports your response </li></ul>

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