20 Mar
2019
20 Mar
'19
4:12 p.m.
On Tue, Mar 19, 2019 at 8:28 PM Keith F. Lynch <kfl@keithlynch.net> wrote:
it's sudden changes in the refractive index that cause reflections.
I'd never thought about this before, but a quick Google suggests that it's not true. Graded-index media have gradual Fresnel reflection. Here's a paper that purports to explain the details: https://pdfs.semanticscholar.org/9f8f/e29d292732c8a7fb1aa82f0ce5df94822077.p...