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All Journal Jurnal Pendidikan Fisika dan Teknologi Indonesian Review of Physics (IRiP)
Chilwatun Nasiroh
University of Jember
Astronomy Earth & Planetary Sciences Education Materials Science & Nanotechnology Physics

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Tunnelling Effect for Quadruples Potential Using Matrix Propagation Method Chilwatun Nasiroh; Bambang Supriadi; Rif'ati Dina Handayani
Indonesian Review of Physics (IRiP) Vol. 3 No. 2 (2020)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/irip.v3i2.3066

Abstract

Semiconductor materials can be used as potential barriers to Tunnelling effects. In this study, four semiconductor materials are arranged in various ways to form a quadruple potential structure to analyze the value of the transmission coefficient. The analysis was conducted using the analytical and numerical matrix propagation method using Matlab2018a. The results confirmed that the inverted arrangement produces the same transmission coefficient value for each energy. So that there are 12 kinds of transmission coefficient values generated from 24 arrangements. The semiconductor material composition with the most considerable transmission coefficient value is ADCB and BCDA, which have a value of 0.8087. The variation of the arrangement affects the value of the transmission coefficient so that it can be used as a guideline for selecting the arrangement that produces the most optimum value of the transmission coefficient from various possible arrangements.
Experimental Validation of Gravitational Acceleration Measurement Using Kater’s Reversible Pendulum Tyas Nisa Fadilah; Niswatul Kariimah; Chilwatun Nasiroh; Habibah Khusna Baihaqi; Dyah Arum Arimurti
Jurnal Pendidikan Fisika dan Teknologi (JPFT) Vol 12 No 1 (2026): January-June
Publisher : Department of Physics Education, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpft.v12i1.12191

Abstract

The measurement of gravitational acceleration is a fundamental experiment in physics education, providing essential understanding of classical mechanics and experimental techniques. This study presents the experimental validation of gravitational acceleration measurement using a low-cost Kater’s reversible pendulum developed for laboratory applications. The apparatus consists of two knife-edge pivots and adjustable masses that enable nearly identical oscillation periods about both pivot points. Oscillation periods were measured for various positions of the movable mass, while sensor-based measurements were used for verification. The equal-period condition was determined analytically from the experimental data and used to calculate the local gravitational acceleration. The measured value was (9.768 ± 0.012) m s⁻², where the uncertainty was estimated using partial differential error propagation based on instrumental uncertainties in length and time measurements. The result shows good agreement with the accepted local gravitational acceleration, with a relative deviation of approximately 0.13%. These findings demonstrate that the developed Kater’s reversible pendulum can provide reliable measurements of gravitational acceleration and is suitable for undergraduate physics laboratories. Accurate determination of gravitational acceleration was found to depend primarily on achieving equal oscillation periods and precise determination of the effective pendulum length.
Co-Authors Bambang Supriadi Dyah Arum Arimurti Fadilah, Tyas Nisa Habibah Khusna Baihaqi Niswatul Kariimah Rif’ati Dina Handayani