Lesson No. 39: Linear Distribution of Velocity—III. The Refraction Problem
Published:January 01, 1959
We have seen that in the medium being considered, the wave paths emanating from a shot-point 0 at the surface are arcs of the circles passing through 0 whose centers lie at a distance vo/a above the surface.
A typical wave path in the section shown in Figure 102 emerges at pickup point P at distance x from 0, the emergence angle there being indicated by ao.
Considering ao as the parameter for the present and noting that the angle made by a wave path at 0 with the vertical is the same as the emergence angle of that wave path at P, we see that as ao varies from 0° to 90°, the point P moves inward from infinite distance toward O.
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Lessons in Seismic Computing
“An elementary text and problem book containing 44 lessons in seismology arranged for selection or combination to cover the normal 36-week course, or for condensation into an 18-week course. The lessons begin without assuming more than secondary school mathematics. An elementary knowledge of calculus is desirable, though not required, for the last half of the book.”