Ex) Article Title, Author, Keywords
New Phys.: Sae Mulli 2020; 70: 863-870
Published online October 30, 2020 https://doi.org/10.3938/NPSM.70.863
Copyright © New Physics: Sae Mulli.
Yu CHEN, Hyejung KWAK, Pyung Kang JUNG, Su Jin MOON, Jung Bog KIM*
Korea National University of Education, Cheongju 28173, Korea
The interference colors caused by the birefringence of a photoelastic material were examined for alignments that can be seen without a polarizer. When light enters a transparent plate with photoelasticity at an incident angle, reflected or refracted light is partially polarized, and this process serves as a polarizing plate. Because the refracted light is divided into ordinary light and extraordinary light, that is, linear polarization components perpendicular to each other, the polarization direction is changed while passing through the medium. Because the refractive index varies with the wavelength of light according to the dispersion relation, the degree of change in the polarization depends on the color. This interference color can be measured without a polarizer. In this study, we tried to explore various configurations in which interference color occurs without a polarizer.
Keywords: Interference color, Birefringence, Photoelasticity, Polarization