On over-reflection of acoustic-gravity waves incident upon a magnetic shear layer in a compressible fluid (Q1901345)

Over-reflection of acoustic-gravity waves incident on a magnetic shear layer in an isothermal compressible electrically conducting fluid in the presence of an external magnetic field is investigated. The reflection and transmission coefficients of the incident waves are calculated. It is shown that there exists a critical level within the shear layer at which the wave incident on the shear layer is over-reflected, that is, more energy is reflected back towards the source than was originally emitted. It is also shown that resonance occurs at a particular value of the phase velocity of the wave.