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.

Question

Philoid · Accepted Answer

Given:

Speed of sound in the tissue, v_s = 1.7 Km/s or 1.7× 10³ ms^-1

Operating frequency of the scanner, v = 4.2 MHz or 4.2× 10⁶Hz

The wavelength of the sound in the tissue is given as,

λ = v_s/v

λ = 1700ms^-1/ 4.2× 10⁶s^-1

λ = 4.1× 10^-4m

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.