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Medium effects on waves Reflection/refraction

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Presentation on theme: "Medium effects on waves Reflection/refraction"— Presentation transcript:

1 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.

2 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 a a a b b2

3 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

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

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