Wave Mechanics Question 815
Question: In a medium sound travels 2 km in 3 sec and in air, it travels 3 km in 10 sec. The ratio of the wavelengths of sound in the two media is
[NTSE 1995]
Options:
A) 1 : 8
B) 1 : 18
C) 8 : 1
D) 20 : 9
Show Answer
Answer:
Correct Answer: D
Solution:
$ v\propto \lambda $
Therefore $ \frac{{\lambda _{1}}}{{\lambda _{2}}}=\frac{v _{1}}{v _{2}}=\frac{2/3}{3/10}=\frac{20}{9} $
BETA
