Medium effects on waves Reflection/refraction

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Presentation transcript:

Medium effects on waves Reflection/refraction When a wave encounters an interface between two layers, part of its energy is reflected back. The other part is refracted (transmitted) into the other medium. Snell’s law governs reflection and refraction angles.

Medium effects on waves Snell’s law Pt Pi Pr Sr St qi qr fr qt ft a1, b1 a2, b2 Sinqi Sinqr Sinqt Sinfr Sinft a1 a1 a2 b1 b2

Medium effects on waves Diffraction occurs when wave encounters sharp discontinuities in the medium important in defining faults generally considered as noise in seismic sections seismic migration usually corrects for this effect

Medium effects on waves Diffraction X Z Earth model T Seismic Section