Less detailed flashcards

• What is the movement direction of particles in longitudinal waves?

  Back and forth in the same direction
• Give an example of longitudinal waves.

  Sound waves
• How do particles move in transverse waves?

  Up and down or side to side
• What is an example of transverse waves?

  Light waves
• What are the key properties of waves?

  • Amplitude: Height of the wave, affects energy
  • Wavefront: Line of equal wave points
  • Frequency (f): Waves per second, in Hertz (Hz)
  • Wavelength (λ): Distance between similar wave parts
  • Period (T): Time for one wave to pass, period = 1/frequency
• How does amplitude affect sound waves?

  Bigger amplitude means higher volume
• What is the definition of wavefront?

  A line of equal wave points
• How is frequency measured?

  In Hertz (Hz)
• What does wavelength represent in a wave?

  Distance between two similar wave parts
• What is the formula for the period of a wave?

  period = 1/frequency
• If a wave has a frequency of 10 Hz, what is its period?

  
  

  p = 1/10
• What do waves transfer across space?

  Energy and information
• What happens to air in a sound wave?

  It vibrates but doesn't move
• What is the wave speed formula?

  v = f x lambda
• If a wave has a frequency of 10 Hz and a wavelength of 2 m, what is its speed?

  20 m/s
• If the period of a wave is 0.5 seconds, what is its frequency?

  2 Hz
• If sound travels at 340 m/s and has a frequency of 100 Hz, what is its wavelength?

  1. 4 m
• What is the wavelength of light with a frequency of , wavelength = velocity / frequency

  =
• What is the Doppler effect?

  • Change in frequency and wavelength
  • Source moving toward you: pitch increases
  • Source moving away: pitch decreases
• What happens to pitch when a wave source moves toward you?

  Pitch gets higher
• What happens to pitch when a wave source moves away from you?

  Pitch gets lower
• What are reflection and refraction in waves?

  • Reflection: Wave bounces back (e.g., light off a mirror)
  • Refraction: Wave bends in a new material (e.g., straw in water)
• What is reflection in wave behavior?


  Wave bounces back off a surface
• What is refraction in wave behavior?

  Wave bends as it passes into another material