IB DP Physics: SL复习笔记4.3.1 Wavefronts

Wavefronts

  • Waves can be represented graphically in two different ways:
    • Wavefronts - lines joining all the points that oscillate in phase and are perpendicular to the direction of motion (and energy transfer)
    • Rays - lines showing the direction of motion (and energy transfer) of the wave that are perpendicular to the wavefront

4-3-1-wavefronts-and-rays_sl-physics-rn

Wavefronts and rays for transverse waves travelling in a horizontal plane

  • The distance between successive wavefronts is equal to the wavelength of the waves
  • Ripple tanks are used a common experiment to demonstrate diffraction of water waves

7.1.1.1-Ripple-tank

Wave effects may all be demonstrated using a ripple tank

  • The diagram below shows how the wavelengths differ with frequency in a ripple tank
    • The higher the frequency, the shorter the wavelength
    • The lower the frequency, the longer the wavelength

8.2.1.2-Ripple-tank-vibrations

Ripple tank patterns for low and high frequency vibration

 

 

 

 

转载自savemyexams

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