# Translations:Reflection coefficients and transmission coefficients/14/en

Jump to navigation
Jump to search

The reflection and transmission coefficients usually refer to a downgoing incident wave. What are the respective coefficients for an *upgoing incident wave*? Let the coefficient subscript *U* denote an upgoing incident wave. We want to determine the reflection coefficient and transmission coefficient for an *upgoing incident wave* in the lower medium with impedance , when the wave strikes an interface with the upper medium with impedance (Figure 2).