>Psychtoolbox>PsychRadiometric

[wavelengthNm] = FrequencyTHzToWavelengthNm(frequencyTHz)

Convert the frequency of light, expressed in THz, to
the wavelength of light expressed in Nm.

How to do this conversion is available in many places, but I
got it from Rodieck, First Steps in Seeing, p. 517. There
you can read that 500 nm <-> 600 THz.

5/23/14 dhb Wrote it.