1
PHYSICS DOPPLER QUESTIONS AND CORRECT
DETAILED ANSWERS |ALREADY GRADED A+
LATEST UPDATE | 2024-2025
Doppler Shift AKA
Ans
Doppler Frequency
The Doppler Effect
Ans
An apparent change in frequency as a result of a change in wavelength caused by motion of a wave
source relative to an observer
Relative motion between the sound source & the receiver creates
Ans
a frequency change
The frequency of sound changes when the sound source & the receiver
Ans
move closer together or father apart
o
o
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, 2
Amount of increase or decrease (in frequency) depends on:
Ans
- Speed of motion
- Angle between the wave propagation direction
- Motion direction
- Frequency of wave emitted by the source
The frequency does not change when the distance between the sound source
& the receiver
Ans
remains constant
The Doppler Principle
Ans
is used to measure red blood cell velocities
As the velocity increases, the Doppler shift
Ans
increases
o
o
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, 3
If the detected frequency is *lower* than the transmitted frequency, the
Doppler shift is
Ans
negative
If the detected frequency is *higher* than the transmitted frequency, the
Doppler shift is
Ans
positive
The Doppler shift is
Ans
a low frequency that "rides" on top of the much higher transducer frequency
Demodulation
Ans
a process that extracts the low Doppler frequency from the transducer's carrier frequency
o
o
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, 4
Transducer frequencies of __________________ are used to perform
Doppler exams
Ans
2 MHz - 10 MHz
Doppler shifts range from _______________________ & fall into the
audible range of sound
Ans
20 Hz - 20,000 Hz (20 KHz)
Doppler Shift =
Ans
Reflected Frequency - Transmitted Frequency
Doppler shifts are created when
Ans
transmitted waves strike moving RBCs
o
o
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© 2024 TestTrackers o Resources & Updates: [Testtrackers - Stuvia US]
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[+254707240657]
PHYSICS DOPPLER QUESTIONS AND CORRECT
DETAILED ANSWERS |ALREADY GRADED A+
LATEST UPDATE | 2024-2025
Doppler Shift AKA
Ans
Doppler Frequency
The Doppler Effect
Ans
An apparent change in frequency as a result of a change in wavelength caused by motion of a wave
source relative to an observer
Relative motion between the sound source & the receiver creates
Ans
a frequency change
The frequency of sound changes when the sound source & the receiver
Ans
move closer together or father apart
o
o
Thank You for Choosing Us!
© 2024 TestTrackers o Resources & Updates: [Testtrackers - Stuvia US]
o Customer Support: o Your Success is Our Mission!
[+254707240657]
, 2
Amount of increase or decrease (in frequency) depends on:
Ans
- Speed of motion
- Angle between the wave propagation direction
- Motion direction
- Frequency of wave emitted by the source
The frequency does not change when the distance between the sound source
& the receiver
Ans
remains constant
The Doppler Principle
Ans
is used to measure red blood cell velocities
As the velocity increases, the Doppler shift
Ans
increases
o
o
Thank You for Choosing Us!
© 2024 TestTrackers o Resources & Updates: [Testtrackers - Stuvia US]
o Customer Support: o Your Success is Our Mission!
[+254707240657]
, 3
If the detected frequency is *lower* than the transmitted frequency, the
Doppler shift is
Ans
negative
If the detected frequency is *higher* than the transmitted frequency, the
Doppler shift is
Ans
positive
The Doppler shift is
Ans
a low frequency that "rides" on top of the much higher transducer frequency
Demodulation
Ans
a process that extracts the low Doppler frequency from the transducer's carrier frequency
o
o
Thank You for Choosing Us!
© 2024 TestTrackers o Resources & Updates: [Testtrackers - Stuvia US]
o Customer Support: o Your Success is Our Mission!
[+254707240657]
, 4
Transducer frequencies of __________________ are used to perform
Doppler exams
Ans
2 MHz - 10 MHz
Doppler shifts range from _______________________ & fall into the
audible range of sound
Ans
20 Hz - 20,000 Hz (20 KHz)
Doppler Shift =
Ans
Reflected Frequency - Transmitted Frequency
Doppler shifts are created when
Ans
transmitted waves strike moving RBCs
o
o
Thank You for Choosing Us!
© 2024 TestTrackers o Resources & Updates: [Testtrackers - Stuvia US]
o Customer Support: o Your Success is Our Mission!
[+254707240657]
