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An Analysis of the Geometrical and Optical Characteristics of Prisms Used in Elementary Schools
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논문 기본 정보

Type
Academic journal
Author
Youngseok JHUN (Seoul National University of Education)
Journal
The Korean Physical Society New Physics: Sae Mulli Vol.73 No.1 KCI Accredited Journals SCOPUS
Published
2023.1
Pages
44 - 51 (8page)

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An Analysis of the Geometrical and Optical Characteristics of Prisms Used in Elementary Schools
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Abstract· Keywords

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In this report, I describe investigations of the dispersive prisms used in elementary-school science classes to determine the extent to which they are uniform and accurate. As samples, I selected eight prisms that are widely used in schools, and I measured their refractive indices as functions of the wavelength of the light as well as their physical properties, such as shape and density. I measured the refractive index at each wavelength using a red He-Ne laser and yellow, green, and blue laser pointers. To ensure the precision of the measurements, I employed a threaded needle fixed to a stand as an indicator to determine the exact path of the light. In addition, rather than measuring the vertex, incident, and deviation angles directly, I obtained them by measuring the side lengths of a triangle drawn along the light path and then calculating the angles using the cosine law. As a result of this investigation, I found that prisms typically used in schools are neither right nor regular and that a variety of widely used materials|especially plastics|have varying densities and refractive index distributions. I also confirmed that some prisms had narrow dispersion, making it difficult to produce a clear spectrum.
#Elementary-science class #Dispersion prism #Refractive index #Wavelength

Contents

Ⅰ. Introduction
Ⅱ. Research Method
Ⅲ. Results and Discussion
Ⅳ. Conclusion
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