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W A V E S

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  • 1. Wave
    • a disturbance that carries energy from place to place.
    • Duck Example 56sec-1:23

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2. Medium

    • the matter that a mechanical wave travels through
    • Examples:
    • can be a solid, liquid or gas

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    • waves in which particles move back and forth in repeating patterns
    • particles themselves do not move very far from their original position

3. Mechanical Waves-

Requires a medium to travel through

      • Ex: Sound, water

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4. Light Waves-

    • A wave that does not need a medium
    • can travel through empty space (vacuum) as well as through a medium

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Drawing

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SPACE

ATMOSPHERE

Drawing

Light Waves

Sound Waves

(Mechanical wave- HAS to have a medium to travel through)

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Wave Basics video 2 min

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Use PHET in GC:https://phet.colorado.edu/sims/html/waves-intro/latest/waves-intro_en.html

  • Explore for 2 minutes: Water
  • Change the frequency
    • what happens as you increase it?
  • Change the amplitude
    • what happens to the size of the water drop?

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Use PHET in GC

  • Explore for 2 minutes: Sound
  • Change the frequency
    • what happens as you increase it?
  • Click particles instead of waves
  • Keep your eye on a red one
    • Does it move? Far or close?

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Use PHET in GC

  • Explore for 2 minutes: light
  • Does frequency of amplitude determine the color?

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Use PHET in GC

-phet wave string

  • Explore for 3 minutes, click oscillate
  • What happens when you increase amplitude?
  • What happens when you increase frequency?