From c3fe7b42ad910a9c0764146df8a29d0b2677cae4 Mon Sep 17 00:00:00 2001
From: Claude Meny <claude.meny@irap.omp.eu>
Date: Sun, 1 Dec 2019 09:20:13 +0100
Subject: [PATCH] Update cheatsheet.en.md

---
 .../02.concept-ray-of-light-overview/cheatsheet.en.md           | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/02.geometrical-optics-foundings/01.concept-ray-of-light/02.concept-ray-of-light-overview/cheatsheet.en.md b/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/02.geometrical-optics-foundings/01.concept-ray-of-light/02.concept-ray-of-light-overview/cheatsheet.en.md
index 1a9db162a..64812533a 100644
--- a/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/02.geometrical-optics-foundings/01.concept-ray-of-light/02.concept-ray-of-light-overview/cheatsheet.en.md
+++ b/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/02.geometrical-optics-foundings/01.concept-ray-of-light/02.concept-ray-of-light-overview/cheatsheet.en.md
@@ -52,7 +52,7 @@ I wanted to make this important remark here, but it is not simple: with Doppler
 !! over the entire electromagnetic spectrum and for any medium:
 !! $`n`$: complex value dependent on the $\nu$ frequency of the electromagnetic wave, strong variations representative of all light / matter interaction mechanisms: $`n (\nu) = \Re[n(\nu )] + \Im[n(\nu)]`$ <br>
 !!
-!! on the visible domain (where $`\lambda_0`$ is more used than $`\nu`$) and for transparent medium : <br>
+!! In the visible domain (where $`\lambda_0`$ is more used than $`\nu`$) and for transparent medium : <br>
 !! real value, small variations of $`n`$ with $`\lambda_0`$ ($`\frac{\Delta n}{n} <1 \%``$)
 
 ##### Optical path