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Réflexion <strong>et</strong> Réfraction (20)Incidence normale (n 1n 2<strong>et</strong> µ 1= µ 2) :A.N: si n 1= 1 <strong>et</strong> n 2= 1.5 --> r = - 0,2 <strong>et</strong> R = Ir 2 I = 0.04Incidence oblique (n 2> n 1):!r "= #r //= r = n 1 # n 2n 1+ n 2<strong>et</strong> t "= t //= t = 2n 1n 1+ n 2r "# r //$ changement de polarisation à la réflexion<strong>et</strong> r s’approche de 1 à l’incidence rasanteAmplitude :!Puissance :
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