Demonstrations in the classroom: Images inside ligth bulbs

Authors

  • Carine dos Reis UCS - Rio Grande do Sul

Abstract

As handling a transparent incandescent light bulb (turned off), a student observes bright images inside of it. Why do they appear? A more careful analysis leads to a curious answer: the inferior part of the light bulb works as a concave mirror and the superior part as a convex mirror. In this article, besides demonstrating experimentally the answer above, the teacher takes advantage of this simple device to become the study of the geometric optics (concave and convex mirrors) more attractive and provocative.

Published

2004-01-01

How to Cite

Reis, C. dos. (2004). Demonstrations in the classroom: Images inside ligth bulbs. Caderno Brasileiro De Ensino De Física, 21(1), 115–119. Retrieved from https://periodicos.ufsc.br/index.php/fisica/article/view/6443

Issue

Section

Artigos

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