L18_SeismicRefractionI-page2 - coefficients for a specific...

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2 Applied Geophysics – Refraction I Critical incidence When r P = 90° i P = i C the critical angle 2 1 sin P P C V V i = The critically refracted energy travels along the velocity interface at V 2 continually refracting energy back into the upper medium at an angle i C Î a head wave Reflection and transmission
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Unformatted text preview: coefficients for a specific impedance contrast Applied Geophysics Refraction I Reflection and transmission coefficients for a specific impedance contrast Post-Critical incidence The angle of incidence > i C No transmission, just reflection...
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