Doppler Effect in Wave Propagation
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Questions and Answers

What is the Doppler effect a result of?

  • The change in amplitude due to the wave's speed
  • The change in wavelength due to the medium
  • The change in frequency due to the wave's velocity
  • The relative motion between the source and receiver (correct)

    • What happens to the wavelength in the direction of the source's motion?

  • It decreases (correct)
  • It remains the same
  • It increases
  • It becomes zero

    • What is the effect on the frequency of the wave due to the Doppler effect?

  • It becomes zero
  • It remains the same
  • It decreases
  • It increases (correct)

    • What is the Doppler effect used for in radar technology?

    <p>To calculate the velocity of an object</p> Signup and view all the answers

    What is true about the Doppler effect in terms of the motion of the source and listener?

    <p>It occurs regardless of whether the source or listener is moving</p> Signup and view all the answers

    What is the relationship between the frequency and wavelength of a wave?

    <p>v = fλ</p> Signup and view all the answers

    What is the minimum speed required for a source to create a sonic boom?

    <p>Faster than the speed of sound</p> Signup and view all the answers

    What is the primary use of Doppler radar in weather forecasting?

    <p>Detecting tornado formation</p> Signup and view all the answers

    What is the primary function of Doppler echocardiogram?

    <p>Indicating the direction of blood flow</p> Signup and view all the answers

    What is the term used to visualize velocities of moving tissues?

    <p>Doppler imaging</p> Signup and view all the answers

    What is the frequency range of ultrasound waves?

    <p>Above 20KHz</p> Signup and view all the answers

    What is the primary application of ultrasound in medicine?

    <p>Using sound waves to look inside the human body</p> Signup and view all the answers

    What type of ultrasound imaging provides one-dimensional information?

    <p>A-Mode</p> Signup and view all the answers

    What is the primary use of B-Mode in ultrasound imaging?

    <p>Measuring cardiac chambers dimensions</p> Signup and view all the answers

    What is the characteristic of laminar flow in blood vessels?

    <p>Layers of flow with slowest flow at the wall</p> Signup and view all the answers

    What is M-Mode ultrasound imaging used for?

    <p>Recording video-like movements</p> Signup and view all the answers

    What type of Doppler ultrasound is used to measure blood flow?

    <p>Continuous wave Doppler</p> Signup and view all the answers

    What is the primary application of A-Mode in ultrasound imaging?

    <p>Echoencephalography and echocardiography</p> Signup and view all the answers

    What is the primary difference between continuous wave Doppler and pulsed wave Doppler?

    <p>The type of crystal used to send and receive the signal</p> Signup and view all the answers

    What is the advantage of power Doppler over color Doppler?

    <p>It is more sensitive in detecting blood flow</p> Signup and view all the answers

    What type of Doppler is used for general assessment of flow in the region of interest?

    <p>Color Doppler</p> Signup and view all the answers

    What is the purpose of the color display in color Doppler?

    <p>To display the direction and velocity of flow</p> Signup and view all the answers

    What is the difference between the flow depicted in red and blue in color Doppler?

    <p>The direction of flow</p> Signup and view all the answers

    What technique is used in pulsed wave Doppler to generate an image?

    <p>Pulse-echo technique</p> Signup and view all the answers

    What is the wavelength of the fundamental frequency on a fixed string?

    <p>Twice the length of the string</p> Signup and view all the answers

    What is the main reason why different strings have different fundamental frequencies?

    <p>They have different lengths and/or linear densities</p> Signup and view all the answers

    How do guitar strings differ from each other?

    <p>They differ in linear density</p> Signup and view all the answers

    What is the characteristic shape of a grand piano's sound box due to?

    <p>The variation in string density and length</p> Signup and view all the answers

    How are individual strings tuned to the exact desired frequencies?

    <p>By changing the tension of the string</p> Signup and view all the answers

    Why are musical instruments designed to have small variations in tension between strings?

    <p>To prevent warping and other damage</p> Signup and view all the answers

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