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Parts of Waves and Wave Properties

Learn about the different parts of a wave, including the components of transverse and longitudinal waves. Understand the relationship between frequency and wavelength and identify the units for measuring frequency. Explore wave properties and their impact on amplitude, height, crest, trough, and period.

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Parts of Waves and Wave Properties

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  1. Topic: Waves Aim: Describe the parts of a wave. Do Now: Take out your HW ditto http://www.youtube.com/watch?v=Z3O2Ju3ULvo HW: Bottom of Kinetic and Potential Energy ditto/

  2. Identify the type of wave described below. • Does not require a medium. • Compressional waves • Particles of the medium move PARALLEL to the direction of the wave. • Requires a medium. • Can travel through a vacuum. • Particles of the medium move at RIGHT ANGLES to the direction of the wave. • Sound waves

  3. Parts of a Transverse wave

  4. y- axis x- axis Normal resting position

  5. Crest Trough

  6. Crest – high points Trough – lowest points

  7. Crest Trough

  8. Amplitude

  9. Amplitude – height Related to energy High amp = a lot of energy

  10. Wavelength – distance bw 2 crests or 2 troughs

  11. Wavelength Wavelength

  12. Parts of a Compressional (longitudinal) wave compression = where particles are close together rarefaction = where particles are far apart

  13. rarefaction compression

  14. Wavelength = Distance bw 2 compressions or 2 rarefactions wavelength

  15. High amplitude: • compression = particles are very close together • rarefaction = particles are very far apart

  16. Frequency # of waves passing a point in a given time 1 wave = 1 crest + 1 trough

  17. As frequency increases, wavelength decreases 1 second

  18. Hertz Unit for frequency Hz 1 Hz = 1 wave per second

  19. The human ear is capable of detecting sound waves with a wide range of frequencies, ranging between approximately 20 Hz to 20,000 Hz.

  20. Period Time it takes 1 wavelength to pass a point Units = seconds As frequency increases, period decreases

  21. Low period High period

  22. Let’s summarize… • Describe the parts of a transverse wave. • Describe the parts of a longitudinal wave. • Describe the frequency of a wave. • Describe the relationship between frequency and wavelength. • Identify the units for frequency. • Describe the period of a wave. • Describe the relationship between frequency and period.

  23. http://www.brainpop.com/science/energy/waves/

  24. A B C Identify each part of a wave labeled in the diagram above. D

  25. Which change in wave properties increases wave amplitude? • Increased wavelength • Increased height • Decreased frequency • Shortened wavelength

  26. Which is the lowest part of a transverse wave? • Amplitude • Crest • Period • Trough

  27. The height of a transverse wave is known as its • amplitude • crest • period • trough

  28. The part of a longitudinal waves where particles are farther apart is known as the • crest • compression • trough • rarefaction

  29. Which of the following changes in wave properties is a result of an increase in wavelength? • Higher crests • Reduced height • Lower frequency • Faster movement

  30. The number of waves passing a point at a given time is known as 1. wavelength 2. frequency 3. period 4. amplitide

  31. The time it takes one wavelength to pass a certain point is known as 1. wavelength 2. frequency 3. period 4. amplitude

  32. Which of the following best describes the relationship between frequency and wavelength? • If the frequency remains constant, wavelength increases. • The wavelength decreases and frequency decreases. • The frequency increases as wavelength decreases. • If the wavelength remains constant, frequency increases.

  33. Which wave has the greatest amplitude? • Which wave has the greater wavelength? • Which wave has the greater frequency?

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