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Cahya Prima, Eka
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Physics

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Development of solar cell experiment for junior high school: investigating the effect of wavelength on current and voltage Rabah Wahidin, Naufal; Cahya Prima, Eka; Riandi
Research in Physics Education Vol. 2 No. 2 (2023)
Publisher : Insitut Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31980/ripe.v2i2.35

Abstract

Laboratory activities have the potential to enhance engagement through observation, experimentation, and active involvement. This study focuses on developing a solar cell experiment for junior high school students. The procedures involve measuring the dominant wavelength across various visible light spectrum and exploring the relationship between wavelength and the voltage and current output from a solar cell. The results indicate a negative correlation between wavelength and voltage/current. The highest recorded voltage and current, 1.75 V and 13.9 μA, respectively, were obtained at a wavelength of 400 nm. In contrast, the light with the highest wavelength, 650 nm, yielded the lowest recorded voltage and current, which were 1.43 V and 8.7 μA. Such laboratory activities can serve as valuable tools for teachers to impart the concept of wavelength and its real-world applications to students without the need for expensive or advance tools.
Low-cost measurement light intensity and efficiency of the lamp For school purposes in science experiment Tegar Saputra, Winata; Cahya Prima, Eka; Riandi
Research in Physics Education Vol. 2 No. 2 (2023)
Publisher : Insitut Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31980/ripe.v2i2.36

Abstract

The purpose of this research is to assist science teachers in carrying out experiments in science classes, particularly physics classes, to ascertain the optimal light intensity and efficiency of various lamp types made of inexpensive materials that are related to scientific concepts. The purpose of this study was to develop a practical learning technique based on experiments to measure the lamp’s energy efficiency and light intensity. Three different types of bulbs were used in this research experiment: CFL, LED, and incandescent. Students select a lamp after the experiment based on observations of light intensity and calculations of the lamp’s efficiency using a solar power meter and efficiency equation. The light intensity of the LED lamp shows the highest value with 18,66W/m2 rather than Compact Fluorescent lamp with 15,05% and incandescent lamp with 0,02%. While the efficiency of the LED lamp is 52,6%, the CFL is 26,89%, and the incandescent lamp is 11,26% Novelty: There is not a lot of study on the measurement of light intensity and the calculation of lamp efficiency using inexpensive materials for science-related student experiments.
Darkness color index analysis using android-based RGB colorimeter for educational science purposes Maulana Ashidiq, Rizki; Cahya Prima, Eka; Riandi
Research in Physics Education Vol. 2 No. 2 (2023)
Publisher : Insitut Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31980/ripe.v2i2.37

Abstract

The UNESCO outlined eight essential competencies that crucial for students to attain the 21st demands. Engaging science learning activities through the experimental practicum can empowers students to employ critical, active, and collaborative thinking when addressing scientific challenges, particularly those related to environmental pollution. The objective of this study how does the effect of TAR amount towards darkness color index using RGB colorimeter application. The research methodology in this study is science practicum development. In this study, science practicum activities are combined with STEM and Project-Based Learning model in conducting the activities. After conducting the experiment, the result shows that the quality of color residue is depend on the amount of TAR and Nicotine inside tobaccos. More amount of TAR in Tobaccos is Darker the color of residue. Furthermore, there are lots of variables that we should consider in this experiment. For example, duration of tobacco smoking (time), the volume of water inside the plastic bottle (volume), and the length of tobaccos (length). Because the variables can affect the tobacco residue and affect the RGB color index.
Inquiry ability of students to develop cognitive ability in learning hydrostatic pressure Sylvia Dewi, Pramita; Cahya Prima, Eka; Widodo, Ari; Rochintaniawati, Diana
Research in Physics Education Vol. 2 No. 2 (2023)
Publisher : Insitut Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31980/ripe.v2i2.75

Abstract

This research aims to implement questions through problem stimuli regarding hydro static pressure based on inquiry investigations. This research is limited to conducting experiments because the focus of the study is analyzing the cognitive abilities of the questions tested on 106 junior high school students. This study uses a quantitative exploratory method that aims to improve the understanding that students go through for their initial inquiry and perspective abilities during the science learning process. Data collection was carried out using a test instrument in the form of description questions whose inquiry indicators had been developed referring to the National Research Council (NRC) indicators, plus a questionnaire to identify students’ perceptions as a secondary data source. The results showed that all stages of inquiry activities had a low percentage of 50.0%. The involvement of students has yet to be able to ask investigative questions in formulating problems to be a significant start, as well as predicting in hypothesising. So it affects the activities of designing experiments and analysing data. This causes scientific reasoning to be challenging to communicate. In comparison, student interest in science learning is only around 51.2%. This proves that the inquiry process aspects are tied to one another, and the role of students must be maximally fully involved in every stage. Teacher and technology support needs to be harmonised to optimise further research.
Stories of physics teachers teaching special relativity concepts in senior high school Nurahman, Arip; Kaniawati, Ida; Cahya Prima, Eka; Suhendi, Endi
Research in Physics Education Vol. 3 No. 2 (2024)
Publisher : Insitut Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Teaching Special Relativity in senior high school presents significant challenges due to its abstract and counterintuitive concepts, which often contradict students’ everyday experiences. This study employs a narrative research approach to explore the experiences of three physics teachers in teaching Special Relativity. The findings reveal that teachers struggle with explaining relativistic effects such as time dilation, length contraction, and simultaneity, as students frequently hold persistent misconceptions influenced by classical mechanics and popular media. Furthermore, curriculum constraints and the lack of appropriate instructional resources hinder effective teaching. The study identifies key pedagogical strategies, including the use of interactive simulations, thought experiments, and historical contexts, to make relativity more accessible. Teachers emphasize the need for conceptual scaffolding before introducing mathematical derivations to ensure students grasp the fundamental principles. Despite the challenges, teachers express passion and excitement when students experience conceptual breakthroughs, highlighting the transformative power of physics education. This study underscores the importance of professional development programs and curriculum adjustments to better support teachers in delivering relativity concepts effectively. Future research should explore additional instructional interventions to enhance relativity education in high schools.
Co-Authors Ari Widodo Diana Rochintaniawati E. Suhendi Ida Kaniawati Maulana Ashidiq, Rizki Nurahman, Arip Pramita Sylvia Dewi Rabah Wahidin, Naufal Riandi Tegar Saputra, Winata