Lesson No. 16: Snell’s Law
Published:January 01, 1959
The preceding lessons have shown the very fundamental and important role played by the relationship existing between the slope of the time-distance curve (dt/dx) of a seismic “event” and the emergence angle of the corresponding wave.
There is yet another concept of equal importance in the study of “geometrical acoustics,” to coin a phrase, which we shall now introduce.
Consider a moving plane wave front which assumes the successive positions of the members of a family of parallel planes. Let its velocity of propagation in the medium be VI. Now suppose that this medium is bounded by a plane surface, called the interface, on the other side of which is a medium in which the velocity of propagation is V2, different from VI.
Figures & Tables
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.”