[{"question":"Ak vlnenie prech\u00e1dza z\u00a0prostredia s\u00a0r\u00fdchlos\u0165ou v1<\/sub> do prostredia s\u00a0r\u00fdchlos\u0165ou v2<\/sub>, tak z\u00e1kon lomu vlnenia znie:","answers":["sin \u03b1 \/ sin \u03b2 = v2<\/sub> \/ v1<\/sub>","sin \u03b1 \/ sin \u03b2 = v1<\/sub> \/ v2<\/sub>","cos \u03b1 \/ cos \u03b2 = v2<\/sub> \/ v1<\/sub>","cos \u03b1 \/ cos \u03b2 = v2<\/sub> \/ v1<\/sub>"],"correct":"sin \u03b1 \/ sin \u03b2 = v1<\/sub> \/ v2<\/sub>","order":"1"},{"question":"Pri postupnom prie\u010dnom vlnen\u00ed kmitaj\u00fa \u010dastice prostredia:","answers":["v\u00a0smere \u0161\u00edrenia sa vlny","kolmo na smer \u0161\u00edrenia sa vlny","pod ostr\u00fdm uhlom na smer \u0161\u00edrenia sa vlny","pod tup\u00fdm uhlom na smer \u0161\u00edrenia sa vlny"],"correct":"kolmo na smer \u0161\u00edrenia sa vlny","order":"2"},{"question":"Ak vlnenie dopad\u00e1 na rozhranie kolmo, uhol odrazu je:","answers":["0 \u00b0","45 \u00b0","90 \u00b0","180 \u00b0"],"correct":"0 \u00b0","order":"3"},{"question":"Zdraviu \u0161kodliv\u00fd zvuk je zvuk s\u00a0hladinou intenzity:","answers":["0,1 dB","1 dB","10 dB","120dB"],"correct":"120dB","order":"4"},{"question":"Interferenciou sa vlnenia zosil\u0148uj\u00fa, ak sa dr\u00e1hov\u00fd rozdiel v\u013an rovn\u00e1:","answers":["z\u00e1porn\u00e9mu n\u00e1sobku polvlny","nep\u00e1rnemu n\u00e1sobku polvlny","p\u00e1rnemu n\u00e1sobku polvlny","trojn\u00e1sobku polvlny"],"correct":"p\u00e1rnemu n\u00e1sobku polvlny","order":"5"},{"question":"Vlnenie sa \u0161\u00edri r\u00fdchlos\u0165ou 20ms-1<\/sup> a jednotliv\u00e9 body kmitaj\u00fa s peri\u00f3dou 0,1s. Ak\u00e1 je frekvencia?","answers":["10Hz","1Hz","0,1Hz","100Hz"],"correct":"10Hz","order":"6"},{"question":"Vlnenie sa \u0161\u00edri r\u00fdchlos\u0165ou 20ms-1<\/sup> a jednotliv\u00e9 body kmitaj\u00fa s peri\u00f3dou 0,1s. Ak\u00e1 je vlnov\u00e1 d\u013a\u017eka?","answers":["10m","0,2m","2m","20m"],"correct":"2m","order":"7"},{"question":"Vlnenie opisuje rovnica : y = 0,15 sin 2. \u03c0. ( t \/ 0,1 \u2013 0,2 . x) [m]. Ak\u00e1 je frekvencia?","answers":["1Hz","10Hz","0,1Hz","100Hz"],"correct":"10Hz","order":"8"},{"question":"Pri postupnom pozd\u013a\u017enom vlnen\u00ed kmitaj\u00fa \u010dastice prostredia:","answers":["v\u00a0smere \u0161\u00edrenia sa vlny","kolmo na smer \u0161\u00edrenia sa vlny","pod ostr\u00fdm uhlom na smer \u0161\u00edrenia sa vlny","pod tup\u00fdm uhlom na smer \u0161\u00edrenia sa vlny"],"correct":"v\u00a0smere \u0161\u00edrenia sa vlny","order":"9"},{"question":"Ak vlnenie prech\u00e1dza s\u00a0prostredia s\u00a0r\u00fdchlos\u0165ou v1<\/sub> do prostredia s\u00a0r\u00fdchlos\u0165ou v2<\/sub> a\u00a0v1<\/sub> > v2<\/sub>","answers":["nast\u00e1va lom ku kolmici","nenast\u00e1va lom","nast\u00e1va lom od kolmice","zachov\u00e1va smer"],"correct":"nast\u00e1va lom ku kolmici","order":"10"}]