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Original file (SVG file, nominally 216 × 131 pixels, file size: 13 KB)
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Summary
| Description |
English: The traversal time of the ray path from A to B is stationary w.r.t. variations of intermediate points such as P and P′. The surface Σ (with unit normal n̂ at P′) is the locus of points that a disturbance at P can reach in the same time that it takes to reach P′; that is, Σ is a secondary wavefront with radius PP′. For purposes of comparison, the traversal time from P to P′ is given by Σ and not (e.g.) by the hypothetical wavefront W. |
| Date | |
| Source | Own work |
| Author | Gavin R Putland |
Licensing
I, the copyright holder of this work, hereby publish it under the following license:
 
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This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. |
| The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 13:16, 22 August 2019 | | 216 × 131 (13 KB) | Gavin R Putland | User created page with UploadWizard |
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