What they didn't tell you in physics -- in eighth-grade physics -- but they should have, and I wish they had, was that if you multiply the frequency times the wavelength of sound or light, you get a constant.
Ce nu v-au spus la fizica- in clasa a opta-- dar ar fi trebuit --si sper sa va fi spus -- e ca daca inmultesti frecventa cu lungimea undei sunetului sau a luminii, rezulta o constanta.