 Reflection and transmission coefficients at a scalar-wave interface

ID: reflection-and-transmission-coefficients-at-a-scalar-wave-interface

For incident and transmitted normal wavenumbers

q_{0}

and

q_{1}

, continuity of a scalar field and its normal derivative gives

R = \frac{q _{0} - q _{1}}{q _{0} + q _{1}}, T = \frac{2 q _{0}}{q _{0} + q _{1}} .

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