english: 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.
non_english: Ali frekevencija svetlosti  koju vidimo je toliko visoka, da talasa gore-dole oko  400 milion miliona puta u sekundi, tako da je nemoguće da je vidimo kao talas. Ali možemo reći, gledajući u boju, koja je to frekvencija.