Utilização de um espectrógrafo de projeção como uma ferramenta para demonstrações sobre polarização da luz

This article describes the use of a projection spectrograph based on an overhead projector for use in classroom demonstrations on light polarization and optical activity. A simple adaptation on a previously developed apparatus allows illustrating several aspects of optical activity, such as circular and linear birefringence, including their wavelength dependence. Specifically, we use the projection spectrograph to demonstrate the optical activity of an aqueous solution of sugar (circular birefringence), of a quartz plate and of an overhead projector transparence film (linear birefringence). A historical survey about the optical activity discovery and the main principles involved is also presented.

Bibliographic Details

Main Authors:	Azevedo,Eduardo Ribeiro de, Faria,Gregório Couto, Batalhão,Tiago Barbin, Castro Filho,Jae Antonio de, Santoni,Ercio, Sartori,Josimar Luiz, Nunes,Luiz Antônio de Oliveira
Format:	Digital revista
Language:	Portuguese
Published:	Sociedade Brasileira de Química 2010
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422010000500036
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