摘要
本文对有趣的物理现象——星芒现象进行了理论与实验探究.通过对相机拍摄成像过程建立物理模型,利用夫琅禾费衍射理论对星芒产生的过程行了理论分析.然后从理论和实验上对比探究了相机光圈形状、光圈大小、入射光波长、相机和光源的距离等因素对星芒形成的影响.最后给出了在夜晚拍出明显星芒的建议.
In this paper,the interesting phenomenon of star-burst(which arose from the pictures taken from bulbs at night)is investigated theoretically and experimentally.Through properly simplifying the physical model of photographing process,the star-burst is analyzed theoretically depending on Francophile diffraction theory,with the influencing factors including the aperture shape,aperture size,incident wavelength and camera distance,etc.Then the influencing factors for star-burst has been systematically studied through contrast experiments.Further comparison on the results got from theoretical and experimental methods has been methodically carried out.Finally,advice for how to obtain obvious star-burst is given.
作者
王莹
周渝涵
夏往所
WANG Ying;ZHOU Yu-han;XIA Wang-suo(School of Materials and Physics,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China)
出处
《大学物理》
2020年第9期41-46,71,共7页
College Physics
基金
中国矿业大学教学研究项目(2018QN36)资助。
关键词
星芒
衍射
影响因素
star-burst
diffraction
influencing factors
