If the speed of a wave is 340 m/s and its frequency is 1700 Hz, then $\lambda$ for this wave in cm will be:
(a) 2
(b) 0.2
(c) 20
(d) 200

Here given, speed of the wave $v=340\ m/s$

Frequency $f=1700\ Hz$

We know the relationship between speed, frequency, and wavelength:

$\boxed{Speed\ of\ the\ sound(v)=frequency(f)\times wavelength(\lambda)}$

So, wavelength$(\lambda)$ for this wave $=\frac{speed(v)}{frequency(f)}$

$=\frac{340\ m/s}{1700\ Hz}$

$=0.2\ m$

Therefore, option (b) is correct.

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Updated on: 10-Oct-2022

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