Ultrasonic waves of frequency 4.5 MHz are used to detect tumor 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 tissue.
3.33 × 10−4 m
frequency of wave =4.5×106 Hz
speed of sound in tissue =1.5×103 m/s
Wavelength =vf
1.5×1034.5×106=
0.333×10−3
3.33×10−4 m