Using a photoresistor to verify irradiance inverse square and Malus' laws - Muramatsu, Mikiya; Tavares Junior, A Dias; Sosman. L P; Fonseca, R J M da; Mota, L A C P da (Iberoamerican Conference on Optics(RIAO), Latinamerican Meeting on Optics, Lasers and Applications(OPTILAS), 2007)