Wave Mechanics Question 857
Question: An underwater sonar source operating at a frequency of 60 KHz directs its beam towards the surface. If the velocity of sound in air is 330 m/s, the wavelength and frequency of waves in air are:
[DPMT 2004]
Options:
A) 5.5 mm, 60 KHz
B) 330 m, 60 KHz
C) 5.5 mm, 20 KHz
D) 5.5 mm, 80 KHz
Show Answer
Answer:
Correct Answer: A
Solution:
Frequency of waves remains same, i.e. 60 Hz and wavelength $ \lambda =\frac{v}{n}=\frac{330}{60\times 10^{3}} $ = 5.5 mm.
BETA
