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et t - UPMC

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Réflexion <strong>et</strong> Réfraction (23)Incidence oblique (n 1n 2<strong>et</strong> n 1> n 2) : si θ i> θ l--> réflexion totalek 2 ty= k 2 t" k 2 tx= k 2( 0n 2 2" n 2 1sin 2 # ) i<strong>et</strong> k ty= k tcos# t(cos 2 " t= n 2 2# n 2 1sin 2 " ) i< 02n 2$ cos" test imaginairecos" t= ± i( n 2 1sin 2 2" i# n ) 22n 2<strong>et</strong> r %=1e i& % ,r // =1ei& //La réflexion déphase l’onde

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