diff --git a/01.curriculum/01.physics-chemistry-biology/04.Niv4/04.electromagnetism/electromagnetism-in-media/electromagnetic-waves-diffusion-by-particules/.gitkeep b/01.curriculum/01.physics-chemistry-biology/04.Niv4/04.electromagnetism/electromagnetism-in-media/electromagnetic-waves-diffusion-by-particules/.gitkeep new file mode 100644 index 000000000..e69de29bb