2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/153336We present a simple analytic scheme for calculating the binding energy of excitons in semiconductors that takes full account of the existing anisotropy in the effective mass, as a complement to the qualitative treatment in most textbooks. Results obtained for excitons in gallium nitride form the basis for a discussion of the accuracy of this approach.3 pages, RevTeXPhysics EducationMaterials Sciencetext