Ultrasonic waves of frequency 4.5 MHz are used to detect tumour in soft tissues. The speed of sound in tissue is 1.5 km s-1 and that in air is 340 m s-1. Find the wavelength of this ultrasonic wave in air and in tissue.

(a) Given:
Frequency of ultrasonic wave

Velocity of air
v = 340 m/sec
Speed of sound in tissue = 1.5 km/s



Wavelength

As we know,





Velocity of sound in tissue





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