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Kako se pojavljuje Echo?

Ogledala će proteći slike i poslati svjetlo natrag. Zidovi također šalju glasove natrag. Ako stojite malo dalje od visokog zida ili velike litice, čut ćete glas kako se okreće unatrag nekoliko sekundi kasnije.

Ako zvučni val naiđe na zid ili visoku i široku stijenu, ona se okreće unatrag prema izvoru. Tako se događa Echo. Ako je izvađen zvuk kratak i zvučni valovi dosegnu bateriju kao normalni, Echo se jasno čuje. Tragovi zvuka ostaju u uhu 1/10 sekundi.

Budući da je brzina zvuka u zraku 340 metara u sekundi, Udaljenost između izvora zvuka i baterije biti Echo mora biti najmanje 17 metara.

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