A Single Slit Diffraction Experimental Apparatus with Variable Angle

Abstract

A variable-angle single slit diffraction experiment instrument belongs to the field of university physics teaching experiment instruments. The variable-angle single slit diffraction experiment instrument mainly comprises a variable-angle slit, a screen and a laser pointer. The variable-angle single slit diffraction experiment instrument is characterized in that: the variable-angle slit is composed of two like straight cylindrical posts and sheet irons, the surfaces of the straight cylindrical posts are smooth, the straight cylindrical posts do not transmit light, one end of one straight cylindrical post and one end of the other straight cylindrical post lean against each other, the sheet irons are respectively fixed on the other ends of the straight cylindrical posts, and the variable-angle slit is vertically fixed on a horizontal flat iron plate by a strip-shaped magnet; the screen is vertically fixed on one end of the horizontal flat iron plate, the laser pointer is attracted on a strip-shaped straight steel pole vertically fixed on the other end of the horizontal flat iron plate by a magnet, and moreover, the light emitted by the laser pointer can be projected to the center of the screen via the variable-angle slit. The characteristics of the patent are as follows: different from the prior art, the variable-angle single slit diffraction experiment instrument realizes the phenomenon that the diffraction angles of diffraction fringes of the same order can be decreased under the same slit as the slit width is increased, the design is ingenious, the variable-angle single slit diffraction experiment instrument is extremely easy to fabricate, the effect is obvious, and more educational functions can be added when the variable-angle single slit diffraction experiment instrument is popularized in teaching.

Description

Technical field [0001] The invention patent relates to a demonstration of a single-slit diffraction experimental instrument with a variable angle, which belongs to the field of college physics teaching experimental instruments. Background technique [0002] In college physics classes, Fraunhofer single-slit diffraction is one of the important contents in college physics teaching. It has a wide range of applications, such as measuring the Young's modulus of metals, etc., in order to make students understand the slit diffraction People have designed separate or continuously changing slits of different widths (slits equal width) commonly used in laboratories to perform single-slit diffraction experiments. There is also a patent CN00200751.7 designed to design a single-slit diffraction device by changing the slit The width of the slit light is the width of the slit for experimentation, etc., the current existing technology cannot achieve a single low-power light source on the same sc...

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Problems solved by technology

[0002] In college physics courses, Fraunhofer single-slit diffraction is one of the important contents in college physics teaching. It is widely used, such as for measuring the Young's modulus of metals. In order to make students understand the slit diffraction , people have designed discrete or continuously changing slits of different widths (equal slits) commonly used in laboratories to carry out single-slit diffraction experiments, and there is also patent CN00200751.7 designed single-slit diffraction devices for light by changing the slit The width of the slit is the width of the slit to conduct experiments, etc., the current existing technology cannot realize a single low-power light source on the same screen to compare the influence of the slit width on the diffraction pattern at the same time, and the production is complicated. The problem is how to realize a new experiment that is ingenious, simple, low-cost, and convenient for students to explore and research. This patent will solve this problem

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