### To convert a frequency to wavelength, we divide the “speed of light” by the frequency. Conversely, to convert a wavelength to frequency, we divide the “speed of light” by the wavelength. To convert the middle audio octave to light (wavelength) we must first raise the note (frequency) forty octaves (frequency times 2, forty times). Example: To convert middle A (440 Hz)to its corresponding wavelength in the visible spectrum....