MCQ
The minimum audible wavelength at room temperature is about
- A$0.2 Å$
- B$5 Å$
- C$5\, cm$ to $2\, metre$
- ✓$20 \,mm$
✓
Answer
Correct option: D.
$20 \,mm$
d
(d) Since maximum audible frequency is $20,000 Hz,$
(d) Since maximum audible frequency is $20,000 Hz,$
hence ${\lambda _{\min }} = \frac{v}{{{n_{\max }}}} = \frac{{340}}{{20,000}} \approx 20\,mm$
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