摘要
设计出一种遮阳伞的抗紫外线性能测定的简易方法,实用性高.采用WG-8A型光栅光谱仪、溴钨灯、衰减片等器材,通过测量中间量——中性衰减片透过率来扩大透过率可测波长范围,间接计算出样品伞布的透过率.通过透过率进一步计算样品的紫外线防护系数.可开发出一个联系实际生活的实验,提升学生学习近物实验的兴趣.
A method of measuring the ultraviolet protection factor of the umbrella was suggested.In the experiment,the WG-8Agrating spectrometer,bromine tungsten lamp,dimmer glass and other equipment were used,and the transmittance of the sample umbrella cloth was calculated indirectly by measuring the transmittance of the dimmer glass which was called the intermediate measured value.That helped us to expand the measurement range of the transmittance.By analyzing the transmittance,the ultraviolet protection factor of the sample was obtained.This experiment,by combining the modern physical experiment with real life,could enhance the students＇ interest.
出处
《物理实验》
2017年第2期43-45,48,共4页
Physics Experimentation
关键词
光栅光谱仪
紫外线防护系数
透过率
中性衰减片
中间量
grating spectrometer
ultraviolet protection factor
transmittance
dimmer glass
intermediate value
