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A hospital uses an ultrasonic scanner to...

A hospital uses an ultrasonic scanner to locate tumours in a tissue. What is the wavelength of sound in the tissue in which the speed of sound is `1.7 km s^-1` ? The operating frequency of the scanner is 4.2 MHz.

Text Solution

Verified by Experts

We are given:
v= 1.7 km/s -1700 m/s
Frequency, v = 4.2 Mhz = `4.2 xx 10^(6) Hz`
We are to calculate:
Wavelength of sound.
Using relation, `lambda = v/u = 1486/10^(6) = 1.486 xx 10^(-3) m = 1.49 xx 10^(-3) m`
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