Modelová Otázka ID 3609 - 
Který z následujících vzorců správně vyjadřuje znění Snellova zákona, jestliže α je úhel dopadu, β úhel lomu, n1, n2 jsou indexy lomu prostředí a v1, v2 jsou rychlosti šíření světla v jednotlivých prostředích?
Správná odpověď je: A
Snellův zákon neboli zákon lomu říká, že poměr sinu úhlu dopadu α a sinu úhlu lomu β paprsku světla je roven převrácenému poměru indexů lomu daných optických prostředí, přičemž lomený paprsek leží v rovině dopadu. Zároveň je poměr sinu úhlu dopadu a sinu úhlu lomu roven poměru rychlostí světla v obou optických prostředích. Matematické vyjádření má tvar
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