wave_mechanics basics_of_mechanical_waves Question 13
Question: The minimum audible wavelength at room temperature is about
[AFMC 1996]
Options:
A) 0.2 Å
B) 5 Å
C) 5 cm to 2 metre
D) 20 mm
Show Answer
Answer:
Correct Answer: D
Solution:
Since maximum audible frequency is 20,000 Hz, hence $ {\lambda _{\min }}=\frac{v}{{n _{\max }}}=\frac{340}{20,000}\approx 20 $
$ mm $
BETA
