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Research on improving the imaging location of mirage by optimizing the curvature radius of concave mirror

autorzy: Junhan.Zhang

I saw a story about a mirage on the news and was very interested. So I checked a lot of relevant information on the Internet, and learned that the formation of mirages is a very rare natural phenomenon, and not everyone is lucky enough to see it. So I came up with an idea to artificially create a mirage phenomenon. II Research background of the works: So I continued to learn from a number of physics teachers to ask for physics knowledge, and at the same time, I looked up information on the Internet. Finally, at the teacher's suggestion, I made this small device named "Mirage Demonstration Device" by using the principle of concave mirror imaging. (Because it was inspired by the natural phenomenon of TV news mirage) The Mirage demo installation I made is just a static imaging display. Its structure and principle are actually very simple. Two double-buttoned concave mirrors are placed inside the carton, a plastic beetle is built into the bottom (for example, a rockery building model), and an LED light; an external mobile power supply. 3D imaging can then be demonstrated using multiple reflections of light. After many experiments, it is concluded that the two concave mirrors should have parabolic curvature. By changing the curvature and aperture size of the upper concave mirror, the position of the virtual image can be appropriately improved. In addition, I tried to add a rotating device, and the display effect of the mirage imaging has been improved. Three research conclusions: At present, the performance of optical teaching aids developed in the domestic market is relatively simple, especially the teaching aids for concave mirror imaging are relatively rare, and this experimental device can fill the gap. Especially after the asymmetric optimization of the radius of the two concave mirrors, the visible range is increased; the use of concave mirrors with different curvatures and radii can clearly display the 3D image above the device, so that the 3D effect image can be imaged at a higher level. s position. In addition, a high-brightness LED light source is used to optimize the light intensity of the object to be imaged, so that the suspended 3D image is brighter and more vivid. After inviting a number of junior and high school physics teachers to demonstrate the practical application in the classroom, it was reported that the device could demonstrate optics-related experiments to the students during the teaching process, and effectively improved the classroom teaching effect. Therefore, it is feasible that the device can be popularized as a teaching tool for physics. In addition, the device can also be popularized and applied as children's toys and home decorations.

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