Abstract

This article discusses the main aspects related to Bell’s inequality, both theoretical and experimental. A new derivation of Bell’s inequality is also presented, which stands out for its mathematical simplicity. The exposition is mainly intended for undergraduate physics students, and places special emphasis on clarifying the meaning and scope of Bell’s theorem in the context of the Einstein-Podolski-Rosen experiment. Copyright by Sociedade Brasileira de Física. Printed in Brazil.