Un rayon lumineux se propage dans un milieu \(n_1\) d'indice de réfraction \(1,15\).
Il pénètre avec un angle d'incidence de \(57,0°\) dans un milieu homogène \(n_2\)
et continue avec un angle de réfraction de \(32,0°\).
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Quel est l'indice de réfraction du milieu \(n_2\) ?
On donnera la réponse avec 3 chiffres significatifs.