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Question
What is the wavelength of the ultrasound in water ?
What is the wavelength of the ultrasound in water ?
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Solution
The correct option is A 1.5mm
The frequencies used
in ultrasonic diagnosis are in the range of 1 to 10 MHz. The speed of sound
waves in the tissues of the human body averages about 1540 m/s (close to that
for water). So, the wavelength of a 1 MHz wave is about λ=v/f=1540/1∙106=1.5∙10–3m=1.5mm.
The frequencies used in ultrasonic diagnosis are in the range of 1 to 10 MHz. The speed of sound waves in the tissues of the human body averages about 1540 m/s (close to that for water). So, the wavelength of a 1 MHz wave is about λ=v/f=1540/1∙106=1.5∙10–3m=1.5mm.
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