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Waves

Waves. What is a wave?. Waves move energy. Transverse Wave. In a transverse wave, the particles move _______________ to the direction of the wave. perpendicular. Terms to Know. In phase – parts of the wave that have the same displacement and are moving in the same direction.

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Waves

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  1. Waves

  2. What is a wave? Waves move energy.

  3. Transverse Wave In a transverse wave, the particles move _______________ to the direction of the wave. perpendicular

  4. Terms to Know In phase – parts of the wave that have the same displacement and are moving in the same direction. • http://funwaves.wikispaces.com/4.+Transverse+wave Amplitude – maximum displacement Wavelength – distance between 2 consecutive particles in phase

  5. Examples

  6. More Terms! • Pulse - The pictures shown have been continuous waves, but there can also be waves caused by a single disturbance. • Period – time it takes for a single wave to go by • Frequency – how many waves pass in a second Period and frequency are reciprocals

  7. Longitudinal Waves In a longitudinal (or compression) wave, the particles move _______________ to the direction of the wave.

  8. Terms to Know In phase, amplitude, frequency, pulse and period all apply to both wave types! • http://funwaves.wikispaces.com/5.+Longitudinal+wave

  9. Examples

  10. So what is a water wave?Transverse or Longitudinal?

  11. Both! • http://faculty.gvsu.edu/videticp/waves.htm

  12. Practice problems • Period and frequency http://www.physicsclassroom.com/Class/waves/u10l2b.cfm

  13. Wave Speed • Wave Speed = wavelength x frequency • V = x f • Wave speed depends on the medium • Practice! http://www.physicsclassroom.com/Class/waves/u10l2e.cfm

  14. Properties of sound waves • Amplitude • Frequency • Volume • Pitch • Which of these terms goes together?

  15. So if wave speed depends on the medium, what happens when a wave encounters a different medium? • reflection • refraction http://www.gpb.org/chemistry-physics/physics/1103 3:30-6:00

  16. Forced vibrations and natural frequencies

  17. Interference aka Resonance http://www.acs.psu.edu/drussell/demos/superposition/superposition.html http://serc.carleton.edu/NAGTWorkshops/deepearth/activities/40826.html

  18. AM and FM radio

  19. Doppler Effect • The perceived pitch is different due to waves getting squished together or spread out by the movement of either the thing making the noise or receiving it. • http://www.gpb.org/chemistry-physics/physics/1201 15:50

  20. Doppler effect

  21. Doppler Effect and the Solar System -Light waves may also experience the Doppler Effect When scientists examine the emission of light from the solar system, they notice a red-shift closer to the earth and a blue-shift _further from the earth. Proves the universe is expanding

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