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Fyzika

Šíří-li se vlnění z prostředí s rychlostí šíření v1 do prostředí s rychlostí šíření v2 a je-li v1 < v2, pak na rozhraní:

Šíří-li se vlnění z prostředí s rychlostí šíření v₁ do prostředí s rychlostí šíření v₂ a je-li v₁ < v₂, pak na rozhraní: