= Chapter 31: The Origin of the Refractive Index
{c}
{tag=Work by Richard Feynman}
{tag=Work by Robert B. Leighton}
{tag=Work by Matthew Sands}
Chapter of <The Feynman Lectures on Physics, Volume I by Richard Feynman and others>. The existing whole-book author credits apply; no separate chapter byline or online-edition publication date is established. Caltech hosts the online edition.
Online text: https://www.feynmanlectures.caltech.edu/I_31.html
Cited passage: §31–1, equations (31.1)–(31.5), driven charges, fixed boundary frequency and wavelength in a medium. The microscopic approximation assumes an index near unity.
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