If a sound wave goes from a cold air region to a hot air region, its wavelength will
-
A.
increase -
B.
decrease -
C.
decrease then increase -
D.
remain constant
Correct Answer: Option B
Explanation
If a sound wave goes from a cold air region to a hot air region (which will be less dense), the velocity decreases, and since the frequency is always constant, the wave length decreases with the velocity