Physics

Waves Vibrations and Oscillations

# How do you calculate wavelength without frequency?

## Answer

###### Wiki User

###### 04/25/2008

You can *measure* the wavelength without knowing the
frequency. This is done by measuring the "nodes" between similar
points of a single-frequency continuous wave. All you need is some
simple lab equipment.
http://www.ted.com/index.php/talks/view/id/237 [the guy measures
the wavelength]

You can calculate the wavelength as follows: Wavelength times Frequency =Velocity (phase velocity in that medium) So the speed of sound in air is about 344 m/s. If the frequency is 1000 Hz, then the wavelength is 344/1000=.344 m. But in this simple relationship you can't call both wavelength and frequency unknowns. You have to have in hand one or the other. See: http://en.wikipedia.org/wiki/Wavelength

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