sdr.wavelength(freq: ArrayLike) → NDArray[float64] Calculates the wavelength λ of an electromagnetic wave with frequency f. λ=cf Parameters:¶ freq: ArrayLike¶The frequency f in Hz of the signal. Returns:¶ The wavelength λ in meters. Examples¶ The wavelength of a 1 GHz signal is 0.3 meters. In [1]: sdr.wavelength(1e9) Out[1]: 0.299792458