Lesson No. 3: Elementary Concepts of the Reflection Problem
Published:January 01, 1959
In this lesson we shall discuss some of the basic ideas which form the structure of the theory of interpretation of reflection seismology. If the eye of an observer, E in Figure 9, looks into a mirror, MM, in order to see the reflection of a point object 0, he will see the reflection at the imaginary point 0', which is called the image point of O. This image point 0' is obtained in this manner: From 0 drop a perpendicular OP to the plane of the mirror MM. Then, extend this perpendicular to 0' so that OP=PO'.
Actually, although the observer at E looks towards this image point 0', the light waves travel from 0 to the mirror MM and from there they are reflected to E. To obtain the path of the light wave from 0 to E, we join 0' to E by a straight line which will intersect MM in a point R. The point R is then the reflecting point and the light wave path is the path ORE.
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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.”