I am interest in finding the amplitude and wavelength of an actual wave in nature that apply to the equation: wavelength = v/f where v = speed of light. This kind of wave would be example of light wave, electron wave, or radio wave, I assume. What I need is the exact measurement of it's amplitude and wavelength observe in nature. Can any please help with finding this kind of information. This information will help me find the vertical vibration velocity of a wave in nature. If amplitude = wavelength/4 then vertical vibration velocity is equal speed of light. If amplitude > wavelength/4 then vertical vibration velocity is greater then speed of light which should not be possible. But I cannot prove until the I know the actual wave behavior in nature.