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2.6 student

  1. 1. What is a wave? January 28, 2015 How many types of wave have you heard of in everyday use? Do they have anything in common?
  2. 2. Aims • Describe the origin of a wave • Explain the properties of a wave
  3. 3. Key terms • Displacement: • Oscillation:
  4. 4. What is a wave?
  5. 5. What causes a wave? • The source of a wave is always something that vibrates • The material that the wave travels through is called the medium
  6. 6. Amplitude, A • The maximum distance that each point in the medium moves from its normal position as the wave passes
  7. 7. • This is the number of waves that pass any point in the medium every second, so it is the same as the number of vibrations per second
  8. 8. • This is the speed at which each wave crest moves through the medium. • Measured in metres per second, m/s or ms-1
  9. 9. Wavelength, λ • This is the length of a complete wave measured from any point to the next identical point – the distance is always the same no matter which point you choose
  10. 10. λfv = Where: v = speed of wave / m/s f = frequency of wave / Hz (1/s) λ = wavelength of wave / m
  11. 11. How can we prove this? What would happen if we increased the wavelength of a wave? What would happen if we decreased the wavelength of a wave?

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