Update annex.en.md

17aa3feb · Claude Meny · 42de6018 · 17aa3feb
Commit 17aa3feb authored Sep 08, 2020 by Claude Meny
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--- a/01.curriculum/01.physics-chemistry-biology/02.Niv2/04.optics/04.use-of-basic-optical-elements/01.plane-refracting-surface/03.plane-refracting-surface-beyond/annex.en.md
+++ b/01.curriculum/01.physics-chemistry-biology/02.Niv2/04.optics/04.use-of-basic-optical-elements/01.plane-refracting-surface/03.plane-refracting-surface-beyond/annex.en.md
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 title: 'new course : beyond'
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 ! *YOUR  CHALLENGE*   :