ϕ = A e i [ ( k + i p ) x − ω t ] = A e i ( k ~ x − ω t ) {\displaystyle \phi =\mathbf {Ae} ^{i[(k+ip)x-\omega t]}=\mathbf {Ae} ^{i({\tilde {k}}x-\omega t)}}
E b ′ ′ = E a n − n ′ n + n ′ {\displaystyle E_{b}^{\prime \prime }=E_{a}{\frac {n-n^{\prime }}{n+n^{\prime }}}}
E b ′ = E a 2 n n + n ′ {\displaystyle E_{b}^{\prime }=E_{a}{\frac {2n}{n+n^{\prime }}}}