How do you find wavelength if your given only the speed?

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SUMMARY

To find the wavelength of a wave when only the speed is provided, additional information is required, specifically either the frequency of the wave or the medium through which it travels. Alternatively, knowing the distance the wave traveled along with the number of modes can also yield the wavelength. This relationship is governed by the formula: wavelength = speed / frequency.

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How do you find wavelength if your given only the speed?
 
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You would need to know something else - either the frequency and the medium through which the wave moved, or the distance the wave traveled and the number of modes.
 

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