wave_mechanics basics_of_mechanical_waves Question 12
Question: A hospital uses an ultrasonic scanner to locate tumours in a tissue. The operating frequency of the scanner is 4.2 MHz$ . $ The speed of sound in a tissue is 1.7 km-s?1. The wavelength of sound in the tissue is close to
[CBSE PMT 1995]
Options:
A) $ 4\times {{10}^{-4}}m $
B) $ 8\times {{10}^{-3}}m $
C) $ 4\times {{10}^{-3}}m $
D) $ 8\times {{10}^{-4}}m $
Show Answer
Answer:
Correct Answer: A
Solution:
$ \lambda =\frac{v}{n}=\frac{1.7\times 1000}{4.2\times 10^{6}}=4\times {{10}^{-4}} $
$ m $
BETA
