NEET Physics Wave Motion MCQ Question with Solution

A hospital uses an ultrasonic scanner to locate tumors in a tissue with a speed of sound of 1.7 km/s. If the operating frequency of the scanner is 2 MHz, what is the wavelength of sound in the tissue?

A

0.85 mm

B

8.5 mm

C

0.17 mm

D

17 mm

Correct Answer

Option A

Detailed Explanation

The wavelength $\lambda$ can be calculated using the formula $\lambda = \frac{v}{f}$ , where $v = 1700$ m/s and $f = 2 \times 10^6$ Hz, giving $\lambda = 0.85$ mm.

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