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Reflection and Mirrors
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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.

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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Transcript

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