2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/111807We present a possibility to measure the degree of polarization of a partially polarized light beam furnished by a real (imperfect) polarizer. A generalized formula for the Malus' law is derived, which holds when a partially polarized light beam passes through a real polarizer.5 pages, 5 figuresPhysics Educationtext