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

Química Nova

Eduardo Ribeiro De Azevedo¹  Gregório Couto Faria¹  Tiago Barbin Batalhão¹  Jae Antonio De Castro Filho¹  Ercio Santoni¹  Josimar Luiz Sartori¹  Luiz Antônio De Oliveira Nunes¹ 

[1] ,Universidade de São Paulo Instituto de Física de São Carlos São Carlos SP ,Brasil

关键词: projection spectrograph;    optical activity;    birefringence;   

DOI  :  10.1590/S0100-40422010000500036

来源: SciELO

【 摘 要 】

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.

【 授权许可】

CC BY-NC   
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