First slide

Introduction to waves

Question

The minimum audible wavelength at room temperature is about

Moderate

A

0.2 Å
B

5 Å
C

5 cm to 2 metre
D

20 mm

Solution

Since maximum audible frequency is 20,000 Hz, hence $λ_{\min} = \frac{v}{n_{\max}} = \frac{340}{20, 000} \approx 20 mm$

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