Waves

    Cards (27)

    • What is amplitude in wave properties?
      Maximum displacement from undisturbed position
    • What is wavelength in wave properties?
      Distance from one wave point to the next
    • What is frequency in wave properties?
      Number of complete waves passing a point
    • What is period in wave properties?
      Time taken for one complete wave to pass
    • What is the frequency of a wave with a period of 0.01s?
      100 Hz
    • How do you calculate wave velocity?
      Wave velocity = frequency x wavelength
    • What is the wavelength of a wave with a frequency of 20 Hz travelling at 120 m/s?
      6 m
    • What happens at a boundary when a wave travels from one medium to another?
      Its velocity and direction can change
    • What can happen to waves at a boundary?
      They can reflect, transmit, or be absorbed
    • What is ultrasound?
      Sound with a frequency above 20,000 Hz
    • What is ultrasound useful for?
      Scans and sonar
    • How do you measure the velocity of ripples?
      Using a ripple tank to measure wavelength and frequency
    • How do you measure the velocity of sound?
      By timing an echo or using an oscilloscope
    • How are electromagnetic waves used in medicine?
      Gamma rays for treatment, X-rays for imaging
    • What are the dangers of high doses of UV, X-ray, and gamma radiation?
      They can cause cancer
    • How do thermograms work in medical imaging?
      They show different temperatures from injuries
    • How do X-rays work in medical imaging?
      They show broken bones
    • How do CT scans produce images?
      They use X-rays to create 3D images
    • How are gamma rays used in medical imaging?
      As tracers to find organ functions
    • How do sound waves travel through solids?
      As vibrations
    • What happens in the ear when sound waves enter?
      They cause the eardrum and bones to vibrate
    • What are the two types of lenses?
      Convex and concave lenses
    • What do convex lenses do?
      Bring parallel rays of light to a focus
    • What do concave lenses do?
      Spread rays of light apart
    • What happens when white light is split by a prism?
      Each color is refracted differently
    • Why do colored surfaces appear a certain color?
      They reflect some wavelengths and absorb others
    • What do color filters do?
      Absorb some colors and transmit others
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