Update form.en.md

2421ae8b · Claude Meny · 3f51a4ae · 2421ae8b
Commit 2421ae8b authored Sep 08, 2020 by Claude Meny
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form.en.md ...surface/05.plane-refracting-surface-parallel-2/form.en.md +2 -0

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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/05.plane-refracting-surface-parallel-2/form.en.md
+++ b/01.curriculum/01.physics-chemistry-biology/02.Niv2/04.optics/04.use-of-basic-optical-elements/01.plane-refracting-surface/05.plane-refracting-surface-parallel-2/form.en.md
 ---
 title: 'Thin lens (parallel 2)'
+published: false
+visible: false
 ---
 new course : parallel 2