Cover Image

An Experiment in the Earth Physics Leaning: Sunlight Observation for Determining Radius of The Earth

Nur Islami


In the learning of the earth physics, sometime students got comfusing due to they cannot imagine how to determine the physical property of the earth such as, its mass, its volume and its diameter. This study was focused on how to use the sunlight for degermation of the earth radius through the simple experiment. In this study, an accurate and simple method have been introduced to the student on how to measure the earth radius. The experiment just used a camera and then the student started to determine the earth radius. In the end of the experiment student can explain how the sunlight can be used to determine the earth radius mathematically. They found that the radius of the earth is about 6243.04 km with a standard deviation of 13.70 km. The average results that is obtained by student is actually within 1.9% of the real value of the earth radius which is at 6371 km. This study shows that the real experiment is definitely able to show the real experience on how to determine the earth radius.


Earth physics; Earth radius; Sun light

Full Text:



Eratosthenes. (2010). Eratosthenes’ ‘Geography’ (Princeton, NJ: Princeton University Press) (Engl. transl. D W Roller).

Gangadharan D. (2009). Measuring the radius of the Earth from a mountain top overlooking the ocean. Phys. Teach. 47, 533–5.

Goodman, F., O. (1993). Measure the Earth’s radius while boating - on one of its lakes Am. J. Phys. 6, 378–9.

French A P. (1982). How far away is the horizon? Am. J. Phys. 50, 795–9.

Muslim, M. A. & Pramesti, A. A. (2014). Penyajian Data Pelanggan pada Lima Area PT. Telekomunikasi Indonesia, Tbk. Kandatel Pekalongan Menggunakan Google Earth. Scientific Journal of Informatics,1 (2), 193-200.

Kristanto, P. (2000). Kolektor Surya Prismatik. Jurnal Teknik Mesin, 2 (1), 22-28

Yazid, A., Pramudya, Y., Okimustava & Muchlas. (2019). Pemanfaatan Metode Moving Average dalam Menentukan Awal Waktu Salat Subuh Menggunakan Sky Quality Meter. Jurnal Astronomi, 5 (1). 1-13.

Daryanto. (2010). Media Pembelajaran Peranannya Sangat Penting Dalam Mencapai Tujuan Pembelajaran. Cetakan kedua. Cetakan kelima. Bandung: PT. Sarana Nurani Sejahtera.

Tjasyono, B. (2016). Ilmu Kebumian dan Antariksa. Bandung: Remaja Rosdakarya.

Surdin. (2017). Meningkatkan Hasil Belajar Siswa Pada Materi Pokok Peta, Atlas Dan Globe Melalui Penerapan Model Pembelajaran Kooperatif Tipe Think Talk Write (TTW). Jurnal Penelitian Pendidikan Geografi, 1(1), 1-16.



  • There are currently no refbacks.

Copyright (c) 2020 Nur Islami

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

 Publisher: FKIP Universitas Riau