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Development and Application of a Light Source for Learning the Concepts of Geometric Optics
New Phys.: Sae Mulli 2019; 69: 85~96
Published online January 31, 2019;
© 2019 New Physics: Sae Mulli.

Donggeul HYUN1, Doocheol KIM*2

1 Department of Science Education, Teachers College, Jeju National University, Jeju 63294, Korea
2 Department of Physics, Jeju National University, Jeju 63295, Korea
Correspondence to:
Received September 11, 2018; Revised November 22, 2018; Accepted December 3, 2018.
cc This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
The concepts of geometrical optics are so abstract that they can be understood by inferring them inductively based on experimental evidence. However, experimental evidence cannot be easily obtained by using exiting systems for geometrical optics experiments. A learning light source that offered experimental evidence in inferring the concepts of geometrical optics inductively was developed in this study. The learning light source is composed of the primary light source and an object card attached to a translucent membrane that reflects light irregularly or transmits light irregularly and has the characteristics of changing the shape intentionally, scattering light into all directions, or emitting light without scattering operationally. Also, some geometrical optics experiments that offer experimental evidence in inferring and understanding the cognition of object, the image formation, the meaning of light tracing, and so on efficiently are proposed in this study.
PACS numbers: 01.40.Ej, 01.50.Pa
Keywords: Geometrical optics, Learning light source, Cognition of object, Image formation, Light tracing

March 2019, 69 (3)
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