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Nanjing Xiaozhuang Xueyuan xuebao

Numerical Simulation and Analyses of Young's Double Slits Experiment

HE Long-qing

Published Jan 1, 2008• 0 citations
OpenAlex

Abstract

Young's double slits experiment was simulated by means of field superposition and numerical calculations.The effects on the interference fringes by the width of source,the width of slits,and the distance from the source to the double slits were discussed.The results showed that the visibility of the fringes decreased when the width of source and the distance between the two slits decreased.

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Young's double slits experiment was simulated by means of field superposition and numerical calculations.The effects on the interference fringes by the width of source,the width of slits,and the distance from the source to the double slits were discussed.The results showed that the visibility of the fringes decreased when the width of source and the distance between the two slits decreased.
Considering double-slit interference as an optical wave passing a through double-slit hard aperture, the intensity expression of Young's double-slit interference is derived based on Collins diffraction integral. The intensity distribution of Young's double-slit interference is graphically demonstrated. The interference fringes will be changes by adjusting the parameter of slit width, double-slit separation, incident wavelength, etc. Meanwhile, the causes for the different brightness at bright fringe center in Young's double-slit interference are discussed. Additionally, the interference fringe width is calculated. The result agrees well with optical interference theory. As an expanding teach method, it will be helpful to understand the double-slit interference characteristics.
tudying from the Huygens-Fresnel's principle,this research first obtains the formula about the light intensity distribution of double-slit interference through the theoretical calculation. Then it simulate the light intensity distribution on the receive screen with the help of Fortran powerstation 4. 0 and Origin 6. 0 Professional software. Lastly,an analysis and discussion is carried out on the impact of the slit width,the distance between the two slits,the light wave length and the distance of receive screen to slit on double-slit interference.
Employing with MatLab, the relative light density distribution of Thomas Young dual-slit interference experiment is presented. This paper analyzes the light density distribution of Thomas Young dual-slit interference under different wavelengths and slit widths, and explains the causes for the different light density distribution in Thomas Young dual-slit interference. It reaches that slit widths are the factors for the uneven intensity distribution of Thomas Young dual-slit interference experiment, and the fringe width is inversely proportional to slit widths. Various parameters impacting on the interference is visually analyzed by means of computer simulation. It has an important guiding role on the optical theoretical study and experimental teaching.