diff --git a/01.curriculum/01.physics-chemistry-biology/03.niv3/02.geometrical-optics/02.geometrical-optics-foundings/02.refractive-index/02.refractive-index-overview/cheatsheet.en.md b/01.curriculum/01.physics-chemistry-biology/03.niv3/02.geometrical-optics/02.geometrical-optics-foundings/02.refractive-index/02.refractive-index-overview/cheatsheet.en.md
deleted file mode 100644
index 588fb60a3..000000000
--- a/01.curriculum/01.physics-chemistry-biology/03.niv3/02.geometrical-optics/02.geometrical-optics-foundings/02.refractive-index/02.refractive-index-overview/cheatsheet.en.md
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----
-title: 'The refractive index F'
-redirect: /m3p2-curriculum/physics-chemistry-biology/foothills/Geometrical-optics/geometrical-optics-foundings/concept-ray-of-light/concept-ray-of-light-f
-append_url_extension: '#refractive-index'
----
-
- 
\ No newline at end of file