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 `1.7km^(-1)`. The operating frequency of the scanner is 4.2MHz.

Nobody can Imagine a world without sound. Sound is a part of our life- musics, ripples, echoes etc. have a lot of applications.Doctors use an ultrasonic scanner to diagnose tumour tissues. If the frequency of the scanner is locate 4.2MHz and the speed of sound wave in the tissue of is 1.7 kms find the wavelength of the sound wave.