光偏振演示实验报告.doc

polarized light 姓名： 班级 学号： 实验名称：偏振光的实验 The purpose of the experiment: to master the spectrometer works, familiar with the principles and properties of polarized light. Verify Malus law, and the refractive index of the medium is determined according to Brewsters law.Experimental principle:The various analyzes and measurements in order to study the polarization properties of the polarization state of light and the use of light, various polarizing element: generating a polarized light component, and to change the polarization state of the light elements, etc., the following classification introduced.1..Produce polarized light componentsLight generated from the laser before the invention, the natural light in general are non-polarized light, and therefore produce the components of the polarized light must produce polarized. Based on the role of these elements in the experiment were divided into a polarizer and an analyzer. The polarizer is an element which converts natural light into linearly polarized light, the analyzer is a polarization state of the element used to identify light. In the laser resonator can take advantage of the Brewster angle of the output laser beam is a linearly polarized light. A lot of natural light becomes polarized, a method using light polarization phenomena in the interface reflection and transmission time. Our ancestors in the very early reflection of the horizontal plane light some research, but quantitative study was first performed in 1815 by Brewster. The reflected light perpendicular to the incident surface of the light vibration (called the s component) than parallel to the incident surface of the light vibration (called p component); while the transmitted light is opposite. Changing the incident angle at the time, there is a special phenomenon, i.e., when the incident angle of a specific value, the reflected light becomes completely linearly polarized light (s-component). Refracted light is partially p