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Frequency/Wavelength Converter

This calculator converts between frequency and wavelength for electromagnetic waves propagating in free space.

The wavelength and frequency of electromagnetic waves are inversely proportional, and related by a factor equal to the speed of propagation in the given medium (i.e., the speed of light, for wave propagation in a vacuum). This means that for a given medium, the higher the frequency of oscillation, the shorter the wavelength.

The calculator below converts between frequency and wavelength for waves propagating at the speed of light. To use it, select your units and enter either frequency or wavelength – the other will be automatically calculated.

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