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Agus Yulianto
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A Simple Photovoltaic Experiment for Measuring Planck’s Constant Using Colour Lasers Nuri, Nuri; Marwoto, Putut; Nugroho, Sunyoto Eko; Yulianto, Agus; Subali, Bambang; Sulhadi, Sulhadi; Sumarli, Sumarli
Variabel Vol 8, No 2 (2025): OCTOBER 2025
Publisher : STKIP Singkawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26737/var.v8i2.8664

Abstract

The photovoltaic experiment provided a simple, affordable method to determine Planck’s constant through empirical learning. This experiment allowed students to present concrete data using easily available, low-cost materials. The experiment utilised a photovoltaic method, employing a simple, self-designed setup that used three laser pointers with wavelengths of 650nm (red), 535nm (green), and 405nm (blue) as independent variables. A 6V, 1W mini solar cell was used as the target, while the speed of light and electron charge were treated as control variables. The laser pointers were powered by a 3V battery. The data were analysed by plotting the relationship between 1/λ (inverse wavelength) and the measured voltage as the dependent variable. A linear regression analysis was performed to obtain the gradient, which was used to calculate Planck’s constant. The experiment yielded a calculated Planck’s constant of 7.09×10-35Js, with a deviation of 5.69 x 10-34Js, resulting in a relative error of 8.89%. This relative error could be attributed to several factors, including refraction effects caused by the glass layer and adhesive used to protect the semiconductor plate of the solar cell, as well as discrepancies between the actual wavelengths of the laser beams and the labelled wavelengths on the laser pointers.
Aplikasi Styrofoam Sebagai Absorpsi Bunyi Allif Silfiyana Rohman; Agus Yulianto; Upik Nurbaiti
Jurnal Teori dan Aplikasi Fisika Vol. 10 No. 1 (2022): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v10i1.279

Abstract

This study aims to determine the level of sound attenuation of Styrofoam material. This research is using a noise meter application Decibel X: dB Sound Level Meter and a sound generator as a sound source. Then Styrofoam as an acoustic material with a thickness of 1 cm; 1.5 cm; 2 cm; 2.5 cm ; 3 cm; 3.5 cm and 4 cm. The average absorption coefficient obtained in this study with a material thickness of 1 cm is 0.023. Then the average absorption coefficient at a thickness of 1.5 cm is 0.031. While the average absorption coefficient at a material thickness of 2 cm is 0.040. Furthermore, the average sound absorption coefficient at a thickness of 2.5 cm and 3 cm has the same value, namely 0.039. Then, the average sound absorption coefficient at a thickness of 3.5 cm and 4 cm also has the same value, which is 0.038. Based on the research that has been done, it can be concluded that sound absorption at frequencies below 1000 Hz occurs significant sound absorption. At frequencies of 200 Hz, 400 Hz, 600 Hz and 800 Hz, the average sound absorption increases from 1 cm to 3.5 cm of Styrofoam thickness. While the thickness of Styrofoam 4 cm on average did not show a significant increase in sound absorption. Styrofoam thickness of 4 cm can effectively absorb sound at a frequency of 1000 Hz only.
Optimalisasi Batu Belah Sebagai Model Tanggul Dalam Upaya Mitigasi Banjir ROB Di Pesisir Pantai Rohamayani Siti; Agus Yulianto; Budi Astuti
Jurnal Teori dan Aplikasi Fisika Vol. 12 No. 02 (2024): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v12i02.400

Abstract

Split stone is a type of irregular stone formed from sedimentary rock deposits and sandstone due to weathering and the influence of abrasion in rivers, so split stones are formed. The utilization of split stone as an embankment can be optimized by varying the angle of inclination of the embankment itself. Coastal dikes were built to mitigate tidal floods that occur in coastal areas and cause physical, material, economic and natural losses. Rob flood is a natural disaster characterized by the release of sea water to land. Rob flooding is caused by land subsidence, tidal waves and the absence of wave barriers. From the results of this research, it was found that the dike with the smallest angle is the most optimal embankment if used on the coast, because the more surface area of the embankment that breaks the waves, the less likely the sea waves overflow into land.   Keywords: embankment, split stone, rob flood, coastal.
TRANSFORMASI SPIRITUAL TOKOH UTAMA DALAM NOVEL ATEIS KARYA ACHDIAT KARTAMIHARDJA Agus Yulianto
MABASAN Vol. 11 No. 2 (2017): Mabasan
Publisher : Balai Bahasa Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62107/mab.v11i2.5

Abstract

The aim of this research is to know the reason of Hasan, the protagonist being anatheist and how the spiritual changing process from a devoted muslim into an atheistand how Islamic thougth denies ateism. The problems in this research are 1) whatcausing Hasan becoming an atheist; 2) how Hasan spiritually changes from adevoted muslim into an atheist; 3) how Islamic thought denies atheism.This studyuses qualitative descriptive method in literature review. Based on the study, it isconcluded that the causes of Hasan’s spiritual changing from a devoted muslim intoan ateist are his weaknees in Islamic thinking tradition and love factor which doesnot follow religious norms and ethics.
Co-Authors - Susanto .Gandri Haryono, M Abd Charis Fauzan Abd. Charis Fauzan Abdul Hamid Abdurrohman Khotim Nugraha Abu Bakar, Suriani Adi Tri Atmaja Adina Widi Astuti Aditya Marianti Afifah, Roidah Nur Agung Nugroho, Puguh Agung Setyo Darmawan Agus Raharjo AGUS SETIAWAN Ahmad Izzuddin Ahsani, Muh Syukri Akanboy, Jerikson Nastorius Akhmadi, Mohammad Fadnan Albari, Raffi Wizdaan Alfiyani, Lina Alifianto, Untung Alit Sadikin Allif Silfiyana Rohman Alvian, Alvian Amiruddin Amrullah Amiruddin Amrullah, Amiruddin Andriyanto Andriyanto Andya Satya Purnomo Putro Andya Satya Purnomo Putro, Andya Satya Purnomo Angelia, Adinda Ani Ariani, Ani Ani Rusilowati Anjaya, Perdana Dika Ansori, Redhitya Wempi Anugrahaini, Ulya Santa Arba Arianto, Ivan Setia Arif Widiyatmoko, Arif Arifin Arifin Armin Sukri Kanna, Armin Sukri Ati, Laras Aulia Litsa Ariffiyah Awaludin Jamil Ayu Paramitha, Amelia Ayu Paramitha, Amelia Ayubi, Dimas Mohamad Azka, Millati Bahar, Abely Aliya Bambang Genjik S Bambang Subali Budi Antoni Saputra Budi Antoni Saputra, Budi Antoni Budi Astuti Budi Astuti Budi Naini Mindyarto, Budi Naini Budi Sudrajat Budiyanto, Saraswati Putri Candra Fanleon Chairumin Alfin D.R, Priyandika Darmoko, Cahya Darsono, Teguh Delvita Puspitasari Dewi, Adelina Ryan Candra Dian Uswatun Hasanah Dian Wahid Hermawan, Dian Wahid Didit Darmawan E. Marhaeniyanto Edi, Sukiswo Supeni Effendy, Suhardi - Eko Budianto Eko Nugroho Yuliono, Eko Nugroho Eli Masnawati Eling Purwantoyo Ellianawati, Ellianawati Endang Susilaningsih Erry Hidayanto Fandi Musthofa A. S. Fandi Musthofa A. S., Fandi Musthofa Fathul Niam Fatiatun, Fatiatun Fianti Fianti Fianti, Fianti Firdhosiyah, Siti Firmansyah Firmansyah Firmansyah Firmansyah, Firmansyah - Fitrianti, Dwi Agung Fitriawan, Margi Fitriawan, Margi Fitriyah, Maghfirotul Gamal Kusuma Zamahsari Gandri Haryono, M. Giovani Siahaan, Fery Hadi Susanto Hariani, Mila Haris Hasni, Nur 'Ainiyyah Herkulana Herkulana Hidayat, Rezaldi Ian Yulianti, Ian Ibnul Mubarok Ihwanudin, Maulana Ika Vidiasari Aristawati Imra, Imra Indra Yuzal Insyiroh, Ilusia Ira Maya Abdiani Issalillah, Fayola Iwan Iwan Iwan junaedi Iwan Junaedi Jahdiah Jahdiah, Jahdiah Jery, Jery Junaedi Harmiansyah, Junaedi Kartono , Kewa, Kristofora Karolina Khayru, Rafadi Khan Khoirun Nisa Khoirun Nisa’, Khoirun Khoirun Nisa’ Khumaedi - Khuzaimah, Ima Siti Kirana, Elsa Kusjuriansah, Kusjuriansah Langlang Handayani Lubis, Mutia Hariza Lucky Zaehir Maulana M. Ainur Rofiq Made D.P, Ngurah Mahardika Prasetya Aji Masduki Masduki Mashudi Mashudi Masturi Masturi Meutia, Eva Moh. Shofi Nur Utami Moh. Shofi Nur Utami, Moh. Shofi Nur Mohamad Ayubi, Dimas Mohammad Qois Syafi Mufatihah, Nishfa Mufidah, Isna Mainnatul Mufti, Afrizal Mufti, Afrizal Muhammad Firdaus Muhammad Haikal Muhammad Rasyid Ridla, Muhammad Rasyid Mukhlisin, Latutik Mulia Rahmayu Mulyanti, Restina Muji Mulyono Mulyono Mumtaza Putri, Anne Nafiusokhib, Nafiusokhib Naila Hilmiyana Syifa Nanang Zamroji Nathan Hindarto Nisa’, Khoirun Nita Rosita Nita Rosita, Nita Noor Alis Setiyadi Noviyanto Noviyanto, Noviyanto Nugroho, Adhi Nugroho, Krisna Ardi Nur Farida Haryanto, Lailin Nur Khasanah Nur Rohman Arif Nur Rohman Arif, Nur Rohman Nurdjanah Hamid Nuri Nuri Nurida Putri, Riska Nurlita, Putri Sandra Nursugiharti, Titih Nuryati, Iis Nur’ainiyyah Hasni Nuzulina, Khoirun Palaifana, Oktorinda Parmin - Parmin Parmin Pramuko Ilmu Purboputro Praptiwi, Ucca Swasti Primadian, Fatimah Putra , Arif Rachman Putra, Ngurah Made Darma Putri Arif, Nur Nabilah Putut Marwoto Rahmah, Nurul Rahman, Nuril Endi Ramadhani, Amanda Dhyan Purna Ramadhani, Athirah Nur Randa, Dendy Redhitya Wempi Ansori Rengganis, Amalia Puspita Reza Faizal, Reza Riameinda Br. Bangun Riameinda Br. Bangun, Riameinda Br. Rivaldi, Muhammadi Rizal Syarief Rizka Silviana Hartanti, Rizka Silviana Roch Aris Hidayat, Roch Aris Rohamayani Siti Rohasad, Rohasad Saeful Bahri Safei, Mawar Samsul Arifin Saputra, Andi Prasasti Saputra, Muhammad Kholil Bayu Sarjito - Sarwi - Sauri, Salsabila Scolastika Mariani Sekarpratiwi, Farah Kinayu Senda, Tamara Rizky Septiono, Priyo Shelly Salista Rahmayanti Sidiq, Alif Lombardoaji Sikumbang, Dandy Julian Simanjuntak, Ricky Febrinaldy Siti Haerani Siti Haerani Siti Munazilah Siti Uswatun Kasanah Sobirin, Mohamad Sobirin, Mohamad Sri Buwono . Sugianto Sugianto Sugiyanto - Sulhadi - Sulistiyo Rini, Ari Sumarli Sumarli, Sumarli Sumini Sumini, Sumini Sunyoto Eko Nugroho, Sunyoto Eko Suparmi Suparmi Supraptomo, RTH Supriyadi Supriyadi Suranto Suranto Suroto, Karunia Setyowati Susanto Sutikno Madnasri Sutikno Sutikno Syafi, Mohammad Qois Syafi’i, Farrel Fadillah Syarif, Junaidi Tere, Theresia Theasy, Yoan Theresia Theresia Topan, Andi Tri Novianto, Tri Ucca Swasti Praptiwi Umi Nahdiyah Upik Nurbaiti Usriyah, Farida Usriyah, Farida Victory, Raja Pingkir Wahyuni, Asri Warol, Khoirul Warol, Warol Wigandi, Dikdik Permana Wulandari, Martina Diah Yani Puspitarini Yani Puspitarini, Yani Yulianto, Sisworo Yulita Nurbaiti Yusuf, Dini Hidayati Zainal Rosyadi