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3.3 Refleksi total internalk r1'k r 12Jika n 1>n 2: θ2> θ1n 1>n 2n 2θ 1θ 2k rzn =1sin θ1n2sinθAgar θ 2=90 o −1, θ1 → θc= sin ( n2/ n1)2xJika θ 1>θ cterjadi refleksi total dari semua energi cahaya. Sudut θ 2menjadi:sin θ2=nn12sin θ1=sin θsin θ1c> 1cos θ2⎛ sin θ ⎞1= 1 −⎜sin θ⎟⎝ c ⎠2⎛ sin θ ⎞1= −i⎜sin θ⎟⎝ c ⎠2− 1 =−icos θCos θ 2berharga imajiner; transmisi meluruh eksponensial terhadap x.E2∝ er ri(ωt−k.)=e−qxei(ω t−k2z sin2 θ 2)25

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