# 30 - reflection and refraction End up with V p V s and...

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01:06 Angle of incidence (i) Angle of reflection (r) They should be the same r = i Snell’s Law : See NOTES Car Analogy Total Internal Reflection DIAGRAM 4 i crit  = critical angle of incidence at all angles greater than i crit , all energy will be trapped in the slower –V layer Love wave Diagram 5 Crust/Mantle crit  = S wave trapped in crust by total internal reflection = love wave the incident angles comes down more shallow Shear wave that has the angle of incident that is greater than the other ones, and  gets trapped  Fiber Optic Cable Diagram 6 Example of Total Internal Reflection Using Seismic Waves to Determine Earth’s Internal Structure

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Seismologists mainly use: Travel times of body waves and our understanding of

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Unformatted text preview: reflection and refraction End up with: V p , V s , and p (rho-density) = function of depth Then use V p , V s , and p in lab studies to relate them to: rock type, composition What we’ve found: Earth has a layered structure by composition Major layers are: crust (then moho), mantle, (then core-mantle boundary), core Moho: layer between crust and mantle Core-Mantle boundary- between the mantle and core SEE DIAGRAM 7 Molten, allowed the early earth to differentiate itself by composition Heavy stuff sunk toward the center of the earth 01:06 01:06...
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## This note was uploaded on 10/19/2010 for the course GEOL 240 at USC.

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30 - reflection and refraction End up with V p V s and...

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