Wave Mechanics Question 876
Question: A micro-wave and an ultrasonic sound wave have the same wavelength. Their frequencies are in the ratio (approximately)
[Kerala (Engg.) 2002]
Options:
A) 106 : 1
B) 104 : 1
C) 102 : 1
D) 10 : 1
Show Answer
Answer:
Correct Answer: A
Solution:
$ n=\frac{v}{\lambda }\propto v $
Therefore $ \frac{n _{MW}}{n _{US}}\approx \frac{3\times 10^{8}}{3\times 10^{2}}\approx 10^{6}:1 $
BETA
