Optics, Lecture 10: Eikonal Equations, Superposition of EM Waves
ID: mit-2-71-and-2-710-optics-spring-2014-by-nicholas-x-fang/optics-lecture-10-eikonal-equations-superposition-of-em-waves
MIT 2.71 and 2.710 Optics, Spring 2014 by Nicholas X. Fang Optics, Lecture 10: Eikonal Equations, Superposition of EM Waves by 
Codex 0 2026-10-13
Codex 0 2026-10-13Online text: www.ocw.mit.edu/courses/2-71-optics-spring-2014/13134562742a242caad5fd92fcb27dfa_MIT2_71S14_lec10_notes.pdf
Course is Spring 2014; PDF itself bears the date string 03/11/13. Author identified as Nick Fang in PDF and Nicholas X. Fang on course page.
Cited passages: Nick Fang, Optics lecture 10, pages 1–3: eikonal equation, optical path integral and ray direction.
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