But the frequency of the light we see is so high, it waves up and down about 400 million million times a second, that we can't possibly see it as a wave. But we can tell, by looking at its color, what its frequency is.
Però la freqüència de la llum és tan alta, -oneja al voltant de 400 bilions de vegades per segon - que no podem veure-la com una ona. Però el color n'indica la freqüència.