2014/03/18 by Leonardo Pereira Vieira, Vieira, Leonardo Pereira, Vitor de Oliveira Moraes Lara +4
Physics and Astronomy · Social Sciences · #Experimental and Theoretical Physics Studies #FOS: Physical sciences #Physics Education (physics.ed-ph) #Popular Physics (physics.pop-ph) #Science Education and Pedagogy #physics.ed-ph #physics.pop-ph
paper · pdf · doi:10.48550/arxiv.1403.4635
in Portuguese, 3 pages, 4 figues
arxiv created 2014/03/18 · openalex publication_date 2014/03/18 · arxiv updated 2014/03/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this paper we show how to obtain the Inverse-square law of the distance to the light intensity emitted from a small source in a simple, fast and with good precision way. With the aid of two smartphones, free apps and a ruler, one is able to measure the distances between the devices listed (one as a source and the other as a measuring light intensity) and the respective light intensities measured by the probeware in the device. The ease of reproduction of the proposed experiment and the penetration of the use of tablets and smartphones among students and teachers, could make the proposed activity a good alternative to the introduction of physical phenomena which exhibit the same functional dependence, such as the Law of Newton's Universal Gravitation and Coulomb's Law.