PARDON: Zrna svjetlosti se najbolje opisuju ovako: www.google.ba/search?q=Photon+packet&biw=1344&bih=718&tbm=isch&imgil=fC2SS7JWcUoseM%253A%253BQudaWyF9yJTwVM%253Bhttp%25253A%25252F%25252Fwww.nist.gov%25252Fpml%25252Fdiv684%25252Ffcdc%25252Fquantum-physicstheory.cfm&source=iu&pf=m&fir=fC2SS7JWcUoseM%253A%252CQudaWyF9yJTwVM%252C_&dpr=1.25&usg=__H28eugPcYQdR1fx0uF3KgPnoEng%3D&ved=0CCgQyjdqFQoTCJ6mo6Tx1cgCFcbXLAodBDsIVg&ei=YrwoVp7tKcavswGE9qCwBQ#imgrc=6RzLW9sQeFqADM%3A&usg=__H28eugPcYQdR1fx0uF3KgPnoEng%3D