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Lensa: Jurnal Kependidikan Fisika
Published by Universitas Pendidikan Mandalika
ISSN : 23384417     EISSN : 26860937     DOI : https://doi.org/10.33394/j-lkf
Core Subject : Science, Education, Social, Engineering,
Astronomy Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Physics
Lensa: Jurnal Kependidikan Fisika (J-LKF) published by the Physics Education Study Program UNDIKMA. J-LKF publishes every 6 months including the study of science and education in the field of physics specifically and natural and applied sciences in general.
Arjuna Subject : Ilmu Sosial - Pendidikan
Articles 275 Documents
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Effect of Temperature and Composition on the FTIR Spectroscopic Properties of Barium Ferrite Compounds: Analysis of Intensity and Peak Position Méité, Namory; Sarkingobir, Yusuf; Kouamé, Alfred Niamien; Sanou, Ali
Lensa: Jurnal Kependidikan Fisika Vol. 14 No. 1: June 2026
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-lkf.v14i1.19857

Abstract

This study analyzes the effect of temperature and composition on the FTIR spectroscopic properties of Barium Ferrite (BaFe) compounds, which have important applications in magnetic technology and data storage. The BaFe samples were synthesized with variations in cobalt (Co) and zinc (Zn) composition at different temperatures to examine changes in peak positions and intensities in the FTIR spectrum. The results show that the processing temperature affects the crystalline structure of BaFe, where increasing temperature leads to a decrease in the intensity of several major peaks, reflecting changes in metal-oxygen bonds and degradation of crystalline bonds. Meanwhile, variations in composition with the addition of Co and Zn increase the peak intensity in the FTIR spectrum, strengthening bond vibrations and improving material stability. This study provides important insights into how temperature and composition can influence FTIR properties in BaFe, which is relevant for applications such as permanent magnet production and magnetic data storage materials. These findings are expected to assist in the development of BaFe materials with more optimal magnetic and optical properties for various technological applications.
Optical Properties of Polymers Under Gamma Irradiation: A Systematic Review 2020–2025 Sithivinayagam, Sithivinayagam; Vincent, Sofia; Pattanaik, Ashutosh; Krishnan, Kumar
Lensa: Jurnal Kependidikan Fisika Vol. 14 No. 1: June 2026
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-lkf.v14i1.19859

Abstract

Gamma irradiation is widely applied in polymer processing, sterilization, and radiation resistance testing, yet its optical consequences are interpreted inconsistently across applications. This systematic literature review synthesizes Scopus indexed experimental studies published between 2020 and 2025 to clarify how gamma exposure modifies polymer optical properties and how interpretation depends on material architecture and analytical approach. Following PRISMA procedures, 657 records were identified, 76 full texts were assessed, and 24 studies met predefined eligibility criteria. The included corpus is dominated by PVA based composites and functional films, with fewer studies on neat engineering polymers and multilayer packaging systems. Across studies, UV–Vis spectral changes and visible color modification are the most frequently reported outcomes. In dosimetry oriented systems, absorbance and color intensity commonly increase with dose and support calibrated optical readout. In stability focused systems, especially EVA based materials, optical constants such as refractive index often remain largely unchanged within moderate dose windows. Optical band gap Eg, when reported, is frequently described as decreasing with increasing dose in composite and doped films, although its magnitude depends on transition assumptions and fitting procedures. Overall, optical response under gamma irradiation is material and context dependent, and changes may indicate either functional responsiveness or degradation, requiring endpoint aware interpretation and more standardized reporting practices.
Construct Validation of a Critical Thinking Disposition Instrument for Physics Education Students: An Exploratory and Confirmatory Factor Analysis Approach Verawati, Ni Nyoman Sri Putu; Rokhmat, Joni; Harjono, Ahmad; Makhrus, Muh
Lensa: Jurnal Kependidikan Fisika Vol. 14 No. 1: June 2026
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-lkf.v14i1.20097

Abstract

This study examined the construct validity of a critical thinking disposition instrument for Physics Education students using an Exploratory Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA) approach. The instrument measured four dimensions of critical thinking disposition, namely open-mindedness, truth-seeking, analyticity, and inquisitiveness, represented by 16 observed indicators. The study involved 250 undergraduate students enrolled in Physics Education programs from 10 public and private universities in Indonesia. Descriptive analysis showed that the mean score of each dimension was 3.00, with standard deviations ranging from 1.07 to 1.10 and Cronbach’s alpha values between 0.745 and 0.784. The data met the requirements for factor analysis, as indicated by a Kaiser-Meyer-Olkin value of 0.863, a significant Bartlett’s Test of Sphericity (χ² = 1247.060, p < .001), and a total reliability coefficient of 0.858. EFA identified a four-factor structure explaining 60.20% of the total variance. CFA further confirmed the adequacy of the measurement model, with all standardized factor loadings exceeding 0.70, composite reliability ranging from 0.847 to 0.857, and average variance extracted ranging from 0.580 to 0.600. These findings indicate that the instrument demonstrates satisfactory construct validity and reliability and is suitable for measuring critical thinking disposition among Physics Education students. 
Comparative Study on the Electrical and Thermal Performance Efficiencies of Film Water-Cooled Solar Photovoltaic Modules Ahmad, Abubakar
Lensa: Jurnal Kependidikan Fisika Vol. 14 No. 1: June 2026
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-lkf.v14i1.20107

Abstract

High operating temperature remains a major factor limiting the outdoor performance of solar photovoltaic (PV) modules, particularly in hot climatic regions. This study aimed to determine the solar input and output power and heat of PV modules under natural air-cooling and film water-cooling conditions, to evaluate the corresponding electrical and thermal performance efficiencies, and to compare the relative performance gains achieved by film water-cooling. The experiment was conducted in Sokoto, Nigeria, using two identical PV modules operated simultaneously under natural air-cooling and film water-cooling conditions. Outdoor measurements were taken from 8:30 am to 5:00 pm over five consecutive days. Solar irradiance, voltage, current, module temperature, water temperature, ambient temperature, and wind speed were measured, and the recorded data were used to calculate solar input and output power and heat, as well as electrical and thermal efficiencies. The results showed a clear diurnal variation in solar input, with peak irradiance, input power, and input heat of 605.2 W/m², 484.2 W, and 242.2 J, respectively, recorded at 12:30 pm. The film water-cooled module generally exhibited higher output power and output heat than the naturally air-cooled module during most observation intervals. Electrical efficiency ranged from 6.22% to 10.52% for the film water-cooled module and from 5.90% to 8.52% for the naturally air-cooled module. Thermal efficiency ranged from 18.82% to 70.64% for the film water-cooled module, compared with 19.26% to 41.16% for the naturally air-cooled module. Overall, film water-cooling improved the electrical and thermal response of the PV module under the tested hot-climate conditions, with the strongest benefit observed during periods of higher solar loading.
Virtual Reality for Physics Learning: A Thematic Review with Cross-Disciplinary Insights on Effectiveness, Immersion, Instructional Design, and Implementation Challenges Dosol-Demonteverde, Mailah Grace; Barrios, Rubilyn G
Lensa: Jurnal Kependidikan Fisika Vol. 14 No. 1: June 2026
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-lkf.v14i1.20166

Abstract

Virtual reality (VR) has gained increasing attention in education, particularly for learning contexts that involve abstract concepts, dynamic processes, and simulation-based experiences. This study presents a structured thematic review of 33 Scopus-indexed articles published between 2021 and 2026, focusing on physics learning while incorporating cross-disciplinary studies as conceptual support. The review examined five major themes: effectiveness in improving learning outcomes and conceptual understanding, immersion and embodiment, suitability for abstract and high-risk contexts, the role of instructional design and usability, and implementation challenges and future directions. The findings indicate that VR is especially beneficial for physics topics such as projectile motion, quantum physics, the photoelectric effect, electric fields, and virtual laboratory activities, where visualization and interaction are essential. Across the reviewed studies, VR was consistently associated with gains in conceptual understanding, engagement, retention, motivation, and learner confidence, although these effects were conditional rather than universal. The review also shows that immersion alone is insufficient; educational effectiveness depends heavily on instructional coherence, usability, intuitive interaction, and contextual fit. Despite its promise, broader implementation remains constrained by cost, infrastructure, teacher readiness, and uneven methodological quality. Overall, VR emerges as a powerful but context-sensitive pedagogical approach for physics learning in contemporary educational and training settings.

Page 28 of 28 | Total Record : 275

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