Physics-Wave Motion

NEET Physics Wave Motion MCQ Question

Type: MCQ-numerical-Medium-Class 11

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 λ\lambda can be calculated using the formula λ=vf\lambda = \frac{v}{f}, where v=1700v = 1700 m/s and f=2×106f = 2 \times 10^6 Hz, giving λ=0.85\lambda = 0.85 mm.

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