Wavelength Calculator
Calculate wavelength from frequency and wave velocity.
This tool is for informational and educational purposes only. It is not a substitute for professional financial, medical, legal, or engineering advice. See Terms of Service.
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Enter the frequency in Hz and the wave velocity in m/s. The calculator computes the wavelength and period. Works for any type of wave: sound, electromagnetic, or mechanical.
About Wavelength
Wavelength is the spatial period of a wave, the distance over which the wave pattern repeats. The fundamental wave equation lambda = v/f connects wavelength, velocity, and frequency. For electromagnetic waves in vacuum, v = c = 3 x 10^8 m/s. For sound, v depends on the medium and temperature. Wavelength is a key parameter in optics, acoustics, telecommunications, and spectroscopy.
Frequently Asked Questions
What is wavelength?
Wavelength is the distance between consecutive peaks (or troughs) of a wave. It is inversely proportional to frequency for a given wave speed.
What wave velocity should I use?
For sound in air: about 343 m/s. For electromagnetic waves (light, radio): about 3 x 10^8 m/s. For sound in water: about 1,480 m/s.
How does wavelength relate to energy?
For electromagnetic radiation, shorter wavelengths carry more energy per photon (E = hf = hc/lambda). This is why ultraviolet light is more energetic than infrared.