Wavelength Flashcards
The wavelength of a cycle in an ultrasound wave can be reported with which units?
a. units of time (sec, min, etc.)
b. units of distance (feet, etc.)
c. units of area (m^2, etc.)
d. mm only
b. units of distance (feet, etc.)
The wavelength of an ultrasonic wave is determined by:
a. the sound source
b. the medium through which the wave travels
c. both a. & b.
d. neither a. nor b.
c. both a. & b.
What is the wavelength of 2 MHz sound in soft tissue?
a. 0.77 mm
b. cannot be determined
c. 1.54 mm
d. 2 mm
a. 0.77 mm
Which of the following terms best describes the relationship between frequency and wavelength for sound traveling in soft tissue?
a. reciprocal
b. direct
c. related
d. inverse
d. inverse
Two sound pulses through the same medium. One wave’s frequency is 2 MHz and the other is 10 MHz.
Which sound wave has a longer period?
a. the 10 MHz pulse
b. the 2 MHz pulse
c. neither pulse
d. cannot be determined
b. the 2 MHz pulse
Two sound pulses through the same medium. One wave’s frequency is 2 MHz and the other is 10 MHz.
Which pulse has a longer wavelength?
a. the 10 MHz pulse
b. the 2 MHz pulse
c neither pulse
d. cannot by determined
b. the 2 MHz pulse
Two sound pulses through the same medium. One wave’s frequency is 2 MHz and the other is 10 MHz.
Which pulse has a lower propagation speed?
a. the 10 MHz pulse
b. the 2 MHz pulse
c. neither pulse
d. cannot be determined
c. neither pulse
Two sound pulses through the same medium. One wave’s frequency is 2 MHz and the other is 10 MHz.
Which pulse has the lowest power?
a. the 10 MHz pulse
b. the 2 MHz pulse
c. neither pulse
d. cannot be determined
d. cannot be determined
Two sound pulses through the same medium. One wave’s frequency is 2 MHz and the other is 10 MHz.
Which pulse has a longer spatial pulse length?
a. the 10 MHz wave
b. the 2 MHz wave
c. neither wave
d. cannot be determined
d. cannot be determined
True or False?
Lower frequency sound creates higher quality images with greater detail.
False
What is the wavelength of a 10 MHz sound in soft tissue?
a. 0.77 mm
b. 0.15 mm
c. 1.54 mm
d. 10 mm
b. 0.15 mm
Two waves, a 5 MHz ultrasonic wave and 5 kHz audible wave, travel through soft tissue.
True or False?
The period of the 5 MHz wave is less than the period of the audible wave.
True
Two waves, a 5 MHz ultrasonic wave and 5 kHz audible wave, travel through soft tissue.
True or False?
The wavelength of the 5 MHz wave is greater than the wavelength of the 5 kHz wave.
False
Two waves, a 5 MHz ultrasonic wave and 5 kHz audible wave, travel through soft tissue.
True or False?
The ultrasound wave travels much faster than the audible wave.
False
Two waves, a 5 MHz ultrasonic wave and 5 kHz audible wave, travel through soft tissue.
True or False?
Both the 5 MHz and the 5 kHz waves travel at similar speeds through the medium.
True
