Update topic.en.md

5 years ago · 6c6963b8d5
1 changed files with 5 additions and 1 deletions
--- a/01.curriculum/01.physics-chemistry-biology/02.Niv2/04.optics/03.optical-systems-vergence/topic.en.md
+++ b/01.curriculum/01.physics-chemistry-biology/02.Niv2/04.optics/03.optical-systems-vergence/topic.en.md
@ -1 +1,5 @@
+---
 title: 'Optical systems'
+published: true
+visible: false
+---