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  • 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 is1.7 km s^-1 ? The operating frequency of the scanner is 4.2 MHz.

Q.15.7 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 is1.7\; km \; s^{-1} ? The operating frequency of the scanner is  4.2\; MHz.

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The wavelength of the sound in the tissue is

\\\lambda =\frac{V}{\nu }\\ \lambda =\frac{1.7\times 10^{3}}{4.2\times 10^{6}}\\ \lambda =4\times 10^{-4}\ m

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