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year 28, Issue 2 (ICOP & ICPET 2022 2022)
ICOP & ICPET _ INPC _ ICOFS 2022, 28(2): 38-41 |
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ebrahimi F, Bahmanpour S, Mahmoudi A. Light Diffraction from a long Phase Strip (slit). ICOP & ICPET _ INPC _ ICOFS 2022; 28 (2) :38-41
URL: http://opsi.ir/article-1-2605-en.html
URL: http://opsi.ir/article-1-2605-en.html
1- University of Qom
2- Physics Department, Faculty of Sciences, University of Qom
2- Physics Department, Faculty of Sciences, University of Qom
Abstract: (545 Views)
The problem of coherent light diffraction from a rectangular aperture in an opaque screen is well formulated in the undergraduate physics textbooks using scalar diffraction theory, and the results of these calculations have long been tested in optics labs and are used for educational and research purposes such as various measurements (for example, the size of a particles). In recent years, Iranian researchers have introduced new options for creating and applying the diffraction phenomenon in accurate measurements, which is the light diffraction from steps created on a reflective surface and diffraction from the edges of transparent objects. In this paper, we study the phenomenon of coherent light diffraction from a rectangular phase strip (slit), calculate the scattered light intensity distribution, and present computational and experimental results. We show that in this case, the usual formulas for measuring the width of the slit cannot be used. Examination of this type of diffraction can be used to measure the dimensions of transparent objects (for example, glass fibers or transparent organisms and particles under a microscope).
Type of Study: Experimental |
Subject:
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