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A comment on After 50 years of effort, researchers made silicon emit light. Parent comment

Re:After 50 years of effort, researchers made silicon emit l... by shsbsuss on Saturday April 11, 2020 @10:46AM (#22841927)
But light in a dielectric medium also travels slower.

If n=1.3 -> v = c/1.3 = 77% of c

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