Abstract
Suppose high frequency sound propagates from a point source in an inhomogeneous medium by ray theory. This paper shows how Snell’s law and its generalizations can be used to prove Fermat’s principle of least time, provided that we restrict to the region free from caustics. Also if the sound speed is a concave function of position it is shown that caustics do not occur so Fermat’s principle applies without further restriction.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.