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All Journal Jurnal Inovasi dan Pembelajaran Fisika
L A Kurniawan
Department of Science Education, Faculty of Mathematics and Science Education, Universitas Pendidikan Indonesia, Bandung 40154, Indonesia
Education Physics

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A Low-Cost Diffraction-based Light Wavelength Measurement for Classroom Purposes Eka Cahya Prima; A Z Y Muntaz; F Muslihah; G S A Muharam; L A Kurniawan; M F Ulfi; W T Saputra
JURNAL INOVASI DAN PEMBELAJARAN FISIKA Vol 10, No 1 (2023): JURNAL INOVASI DAN PEMBELAJARAN FISIKA
Publisher : Program Studi Pendidikan Fisika, FKIP Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jipf.v10i1.19690

Abstract

As requested by science education curricula, students are challenged to analyze light properties through optical instruments. However, the light is an electromagnetic wave, and it is very short and not easy to be measured using conventional instruments like a vernier caliper. The research aims to measure light wavelength by analyzing the light diffraction phenomenon for classroom purposes. The method applied Huygens's diffraction principle. The parameters used for the independent variable are the types of lasers and the gap between the laser and screens. Next, the dependent variables are the diffraction angle, wavelength (?), and the gap between diffraction spots. We used diffraction slits (2,500 and 7,500 lines per inch) as control variables. Three laser beams passing through the various slits can be seen and further evaluated to estimate the wavelength. The result shows that the lasers with different wavelengths (665.45, 544.35, 416.20 nm) have been demonstrated successfully with percent errors of 2.32-2.76% and percent differences of 2.29-2.73%. We have concluded that this low-cost experiment can be implemented in school.
Co-Authors A Z Y Muntaz Eka Cahya Prima F Muslihah G S A Muharam M F Ulfi W T Saputra