Question

A hospital uses a ultrasonic scanner to locate tumor in a tissue what is the wave length of the tissue in which speed of sound is 1.7km/sec the operating frequency of the scanner is 42 MHz

Answer 1

Speed of sound in the tissue, v = 1.7 km/s = 1.7 × 103 m/s
Operating frequency of the scanner, ν = 4.2 MHz = 4.2 × 106 Hz
The wavelength of sound in the tissue is given as:
λ = v/v
= 1.7 × 103 / 4.2 × 106 = 4.1 × 10-4 m.

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