Besides the color contrasts may as well happen to contrasts of shades, probably reflected interference of waves of visible light on the microscopic structure of barley awns (similar to diffraction grating) during various phases of the ear rotation.
Licha ya tofauti ya rangi inaweza kutokea kama vile tofauti ya vivuli, pengine yalijitokeza kuingiliwa ya maumivu Wakati wa awamu mbalimbali za mzunguko sikio.