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Waves

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  • Which type of wave needs a medium?
    Mechanical Wave
  • What happens to speed of light in glass? It increases or decreases
    It decreases
  • Total internal reflection occurs when...?
    Angle > critical angle (in denser medium)
  • What is the unit of frequency?
    Hertz (HZ)
  • Sound is what type of wave?
    Longitudinal
  • Light is what type of wave?
    Transverse
  • What stays the same during refraction?
    Frequency
  • A wave has frequency 10 Hz and wavelength 2 m. Speed?
    20 m/s
  • What’s the formula for wave speed?
    v = f × λ
  • What’s the name for the bending of waves around obstacles?
    Diffraction
  • What’s the critical angle?
    Angle of incidence where refracted ray is 90°
  • What’s faster: light or sound?
    light
  • Define the amplitude of a wave.
    Maximum displacement from rest (Mean position)
  • What changes when a wave enters a different medium?(Dispersion)
    Speed and wavelength
  • In refraction, light bends ______ the normal when entering a denser medium.
    Towards
  • Law of reflection: angle of incidence = ?
    Angle of reflection
  • What do waves transfer?
    Energy
  • Echoes are caused by what?
    Reflection of sound
  • Do waves transfer matter?
    No
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