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Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika
Published by Universitas Sultan Ageng Tirtayasa
ISSN : 2442515X     EISSN : 25281976     DOI : http://dx.doi.org/10.30870/gravity.vxix
Core Subject : Science, Education,
Astronomy Earth & Planetary Sciences Education Materials Science & Nanotechnology Physics
The focuses of the manuscript received in the Gravity journal is limited to the topic: Physics Education (Media, Educational Policy, Assessment, Learning Model) Theoretical Physics Material Physics Earth and Environmental Physics Astrophysics Medical Physics Computational Physics and Instrumentation
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 224 Documents
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Misconceptions of second-year Bantenese students on the concept of frequency and period: Rasch analysis of a multi-tier diagnostic instrument Anissa Listiana Maharani; Diah Permana Sari; Ade Fathurohman; Tresna Galih Sukma Suryana
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 12, No 2 (2026)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/gravity.v12i2.33134

Abstract

This study aims to develop and validate a multi-tier diagnostic instrument designed to recognize high school students' misconceptions about the concepts of wave frequency and period. The instrument development process followed the 3D+1I methodology, which consists of the steps of Definition, Design, Development, and Implementation. The participants involved were 59 second-year Bantenese students (22 boys and 37 girls), with an average age of about 16 years. The designed instrument consisted of seven questions and was analyzed using the Rasch model to assess its validity and reliability. The analysis using Winstep 3.7.3 shows that the instrument has good psychometric properties: person reliability (0.81–0.85), item reliability (0.88), and Cronbach’s Alpha (0.84). The instrument also demonstrates a good spread of item difficulty (logit range: -0.65 to 0.73) and excellent discriminating power (PT-Measure Corr: 0.65–0.77). This instrument provides a practical tool for teachers to identify specific misconceptions in frequency and period concepts, enabling the design of targeted remedial instruction and improving the effectiveness of physics teaching.
The relationship between effective potential, radial probability distribution, and radial nodes in hydrogenic systems via a computational approach Bambang Supriadi; Dyah Arum Arimurti; Zilfiyatul Makida; Kiki Dinda Octari; Mah Citra Yunia Artika Putri; Ulvia Khoirunisa Bisanti; Nisrina Nafisah
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 12, No 2 (2026)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/gravity.v12i2.40145

Abstract

The hydrogen atom is a fundamental system in quantum mechanics, yet studies that integrate the effective potential structure, radial probability distribution, and radial node patterns remain limited. This study aims to characterize the interrelationship of these three aspects through a computational approach. The method used is a combination of analytical solutions to the radial Schrödinger equation and numerical evaluation to calculate and visualize the effective potential, radial wave functions, and probability distributions. Furthermore, radial nodes are identified using a combination of the principal quantum number n and the azimuthal quantum number l. The results show that variations in l modify the topology of the effective potential through centrifugal resistance, while an increase in n broadens the probability distribution according to the scaling law . The radial node pattern follows the relation , indicating an interaction between radial excitation and angular momentum. Overall, the probability distribution and radial nodes are direct consequences of the effective potential structure. This study provides a unified analytical framework for comprehensively understanding the radial structure of hydrogenic systems.
Physics e-module based on local wisdom, mobile apps, and verses of the Quran to improve higher-order thinking skills and student character Muhammad Zaini; Jamiluddin Jamiluddin; Anniel Septian; Yudi Guntara
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 12, No 2 (2026)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/gravity.v12i2.42568

Abstract

This research is motivated by the lack of integration of physics lessons with local culture and religious values, and the minimal use of technology in learning, resulting in students' low learning motivation and low thinking skills (LOTS), as reflected in their learning outcomes. Other impacts include student character, which is considered unimportant, as evidenced by a lack of responsibility, discipline, and honesty in carrying out tasks assigned by their teachers. This study aims to determine the feasibility, practicality, and effectiveness of the developed physics e-module. The research method used is R&D using the 4D model. The feasibility of the e-module was tested by 3 validators consisting of material, media, and HOTS instrument validators, and student characteristics. Practicality was tested by collecting student responses to the developed e-module. Effectiveness was tested using the N-Gain formula to see the influence of each variable independently using the t-test, and to see the influence of the e-module on HOTS and Character simultaneously tested using the MANOVA test. The results of the study consist of the results of the feasibility test of materials, media, HOTS instruments, and characters, which sequentially obtained average scores of 3.4; 4.37; 4;3; 4;2. The percentage of student responses to the e-module was 81.33%. The N-Gain Test result was 0.72. The independent t-test obtained a value of 0.00; the MANOVA test obtained a value of 0.006. Thus, it can be concluded that the developed e-module is feasible, practical, and effective for use in physics learning to improve HOTS and student character.
Green synthesis and electrical properties analysis of Ferrite nanoparticles using Phyllanthus acidus leaves extract Lalu A. Didik; Dela Yunita Rizki; Kurniawan Arizona; Muhammad Arif Firmansyah; Isniwana Damayanti
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 12, No 2 (2026)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/gravity.v12i2.38683

Abstract

This study aims to synthesize ferrite (Fe₂O₃) nanoparticles using the green synthesis method based on cermai leaves extract (Phyllanthus acidus) and analyze its functional group, morphology, element composition, and electrical properties. The synthesis process is carried out with calcination temperature variations of 500 °C, 600 °C, and 700 °C. FTIR characterization shows the formation of Fe–O bonds as well as reduced organic residues as calcination temperatures increase. SEM results show an almost spherical particle morphology with a tendency to increase grain size and agglomeration at higher temperatures. EDX analysis confirmed that the material is composed of elements Fe and O without significant impurities, with compositions closest to stoichiometry Fe₂O₃ obtained at intermediate calcination temperatures. Electrical properties tests show that an increase in calcination temperature leads to an increase in the dielectric constant and a decrease in resistivity, which is related to grain growth and an increase in the regularity of the crystal structure. The results of this study show that cermai leaf extract has the potential to be a green synthesis agent in producing Fe₂O₃ nanoparticles with good electrical properties and environmentally friendly.

Page 23 of 23 | Total Record : 224

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