Waves

• What do waves transfer from one place to another?

  Energy
• What happens when light waves pass from a phone screen to your eye?

  Only energy is transferred
• How does our brain interpret energy from waves?

  It builds images and tunes
• What do waves do as they travel?

  Vibrate or oscillate
• In a displacement distance graph, what does distance represent?

  How far the wave has traveled
• What is the maximum displacement of a wave called?

  Amplitude
• What is the distance of one entire oscillation called?

  Wavelength
• What is the opposite of the crest in a wave?

  Trough
• What is the time period of a wave?

  Time for one complete oscillation
• If the time period is 0.5 seconds, what is the frequency?

  2 Hz
• How do you calculate frequency from the time period?

  Frequency = 1 / Time period
• If the frequency is 4 Hz, what is the time period?

  0.25 seconds
• How do you calculate wave speed?

  Wave speed = Wavelength × Frequency
• What is the wave speed of a sound wave with a frequency of 400 Hz and wavelength of 70 cm?

  280 m/s
• What is the unit for measuring frequency?

  Hertz
• In transverse waves, how are oscillations oriented relative to energy transfer?

  Perpendicular
• What are examples of transverse waves?

  Light waves, water waves, guitar strings
• What happens in longitudinal waves regarding regions of compression?

  Regions become more compressed and spread out
• How are oscillations oriented in longitudinal waves?

  Parallel to energy transfer
• What are the key differences between transverse and longitudinal waves?

  • Transverse waves: oscillations perpendicular to energy transfer
  • Longitudinal waves: oscillations parallel to energy transfer
  • Examples:
  • Transverse: light waves, water waves
  • Longitudinal: sound waves, seismic p waves
• What are the basics of waves discussed in the video?

  Labeling parts, calculating wave speed, types
• What do waves transfer from one place to another?

  Energy
• Do waves transfer matter?

  No, they do not transfer matter
• How does our brain interpret energy from waves?

  By building images and tunes
• What is the distance in a displacement-distance graph?

  How far the wave has traveled
• What is the displacement in a displacement-distance graph?

  How far from the equilibrium point
• What is the maximum displacement of a wave called?

  Amplitude
• What is the distance of one entire oscillation called?

  Wavelength
• What is the opposite of the crest in a wave?

  Trough
• What does a displacement-time graph show?

  Displacement over time
• What is the length of one complete oscillation in a displacement-time graph called?

  Time period
• What does the time period measure?

  Time for one complete oscillation
• If the time period is 0.5 seconds, what is the frequency?

  2 Hz
• How do you calculate frequency from the time period?

  Frequency = 1 / Time period
• If the frequency is 4 Hz, what is the time period?

  0.25 seconds
• How do you calculate wave speed?

  Wave speed = Wavelength × Frequency
• What is the wave speed of a sound wave with a frequency of 400 Hz and wavelength of 70 cm?

  280 m/s
• What is the first step in calculating wave speed?

  Convert wavelength to meters
• What are transverse waves?

  Oscillations are perpendicular to energy transfer
• What are examples of transverse waves?

  Light waves, water waves, guitar strings