Wavelength Calculator
Calculate wavelength from wave speed and frequency.
Formula
Wavelength λ = wave speed / frequency.
What Is Wavelength?
Wavelength is the distance between repeating points of a wave, such as crest to crest. For a known propagation speed and frequency, wavelength is found by dividing speed by frequency.
Example Calculation
A 500 Hz sound wave traveling at 343 m/s has a wavelength of 343 / 500 = 0.686 m.
Factors and Interpretation
At a fixed wave speed, higher frequency produces a shorter wavelength and lower frequency produces a longer wavelength. When a wave enters another medium, its frequency generally remains fixed while speed and wavelength can change.
Frequently Asked Questions
What unit is wavelength measured in?
The SI unit is the meter, although nanometers and other units are common for very short wavelengths.
Can frequency be zero?
A zero frequency would make this calculation undefined for a propagating periodic wave.
How is wavelength related to photon energy?
For electromagnetic radiation, shorter wavelength corresponds to higher photon energy.
Related Tools
Formula and Practical Limits
Wavelength, frequency and wave speed are related by λ = v/f. Use compatible units and remember that wave speed depends on the medium; electromagnetic waves travel at c only in vacuum.