english: So to explain that -- if you've got an elementary particle and you shine a light on it, then the photon of light has momentum, which knocks the particle, so you don't know where it was before you looked at it.
non_english: Aby som to vysvetlil -- ak máte elementárnu časticu a zasvietite na ňu svetlom, fotón svetla má hybnosť, ktorá sotí časticu a teda neviete, kde bola predtým ako ste sa pozreli.