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Doppler effect

Quiz by Khuloud Baghdadi

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10 questions
Show answers
  • Q1
    What is the Doppler effect?
    The decrease in speed of a wave as it travels through a medium
    The production of sound variations by musical instruments
    The change in frequency or wavelength of a wave in relation to an observer moving relative to the wave source
    The reflection of sound waves off surfaces
    30s
  • Q2
    What happens to the perceived frequency of a sound when the source is moving away from an observer?
    The sound stops completely
    The perceived frequency increases
    The perceived frequency decreases
    The perceived frequency remains the same
    30s
  • Q3
    In which scenario would you NOT observe the Doppler effect?
    The source is moving towards a stationary observer
    The source is moving away from a stationary observer
    The observer is moving towards a stationary source
    The source and observer are stationary relative to each other
    30s
  • Q4
    What is an example of the Doppler effect in everyday life?
    The sound of a guitar string vibrating
    The echo of sound bouncing off a wall
    The constant tone of a radio station
    The change in pitch of a train horn as it approaches and then passes by
    30s
  • Q5
    Which type of wave commonly demonstrates the Doppler effect?
    Water waves
    Sound waves
    Only electromagnetic waves
    All types of waves
    30s
  • Q6
    How does the Doppler effect relate to light waves from a moving star?
    It causes a shift towards the red or blue end of the spectrum depending on the direction of motion
    It changes the size of the star's image
    It has no effect on light waves
    It only affects the brightness of the star
    30s
  • Q7
    What effect does the Doppler effect have on the perceived frequency of a sound wave as the source approaches an observer?
    The perceived frequency remains the same
    The perceived frequency becomes zero
    The perceived frequency decreases
    The perceived frequency increases
    30s
  • Q8
    What is the primary reason the Doppler effect occurs?
    The difference in temperature of the medium
    The amplitude of the sound wave fluctuating
    The relative motion between the source of the wave and the observer
    The distance of the source from the observer
    30s
  • Q9
    What happens to the sound frequency if a car with a loud horn is moving towards you?
    The sound frequency decreases
    The sound frequency becomes inaudible
    The sound frequency increases
    The sound frequency stays the same
    30s
  • Q10
    What effect does the Doppler effect have on echos?
    It does not affect the echo itself, but the frequency of the original sound can change based on the observer's motion
    It makes the echo occur sooner
    It changes the direction of the echo
    It causes the echo to sound louder
    30s

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