Update cheatsheet.en.md

01.curriculum/01.physics-chemistry-biology/02.Niv2/04.optics/03.optical-systems-vergence/02.optical-systems-vergence-overview/cheatsheet.en.md

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 title: 'new course  : overview'
 media_order: 'objeto-fisico-imagen-virtual-haz-3-rayos-bb.jpg,objeto-fisico-imagen-virtual-pantalla-bb.jpg,objeto-imagen-posicion-tamano-bb.jpg,objeto-imagen-bb.jpg,objeto-imagen-3-rayos-bb.jpg,plano-imagen-real-convergencia-bb.jpg,plano-imagen-real-convergencia-pantalla-bb.jpg,plano-objeto-fisico-bb.jpg,vision-object-b.jpg,imagerie-rays-optics.gif,vision-object-image-2.jpg,vision-image.jpg,axe_opt.gif,plano-objeto-plan-image-bb.jpg,objeto-imagen-haz-3-rayos-bb.jpg,objeto-fisico-imagen-virtual-haz-3-rayons-pantalla-bb.jpg,plano-objeto-plano-imagen-real-pantalla-bb.jpg,sym_rev_2.gif,imagerie-rayons-lens-1.jpg,imagerie-rayons.jpg,imagerie-rays-optics.jpg'
+published: true
+visible: true
 ---
 
 <!--To be organized diferently, in is not study of "reality" and model it with physical principles and laws, it is more linked with technology : what is an image and how to do it : so remains unpublished