ISBN: | 978-5-5110-0681-9 |
High Quality Content by WIKIPEDIA articles! In physics and optics, the Abbe number, also known as the V-number or constringence of a transparent material, is a measure of the material`s dispersion (variation of refractive index with wavelength) in relation to the refractive index. It is named after Ernst Abbe (1840–1905), the German physicist who defined it.