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• 14:23, 4 September 2026 Oluschinski talk contribs created page Refraction Index (Created page with "{{Language_sel|LANG=ger|ARTIKEL=Brechzahl}} {{PSM_Infobox}} <span style="font-size:1.2em;font-weight:bold;">Refraction index or refraction number</span> __FORCETOC__ ==Characteristics of light== For many applications of plastics, their optical properties are of particular importance. The metrological basis for test methods with which such properties can be quantitatively recorded is based on the fundamentals of geometric optics (also known as rays optics)....")