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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:30 |
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Conference: Bucharest University Faculty of Physics 2014 Meeting
Section: Physics Education
Title:
Using the Vee heuristic in laboratory classroom for teaching and learning physics of photonic devices
Authors:
Claudia CZIPROK(1,2), F.F. POPESCU(1)
Affiliation:
1) Department of Physics, University of Bucharest, Bucharest–Magurele, Romania
2) ”Elisa Zamfirescu” Technical College, Satu Mare, Romania
E-mail
clcziprok@yahoo.com
Keywords:
the Vee diagram, conceptual map, cognitive learning theory, meaningful learning, physics, Einstein's theory, Planck's constant, photoelectric effect, photonic devices
Abstract:
The present work presents an experimental approach using photonic devices and an example of using a visual approach as a method based on constructivist mode of teaching and research knowledge of quantum physics to the study of the photoelectric effect in high school. Making Vee diagram is progressive; we used the software tool developed at IHMC CmapTools. First, focus on relevant background for the photoelectric effect. Construction of conceptual maps with the history of discovery of the photoelectric effect generates students' understanding of the relationship between concepts especially in the context in which they occurred. Understanding Planck relationship that links between energy and frequency, due to the quantization of energy, is a crucial step. It is one of the most famous examples of the corpuscular nature of light, which led to the development of quantum mechanics in the early 20th century. Its explanation is still the standard in teaching physics in high school. Then, as advanced organizers, we have completed together, from the concepts about semiconductors, energy bands structure, p-n junction and electronic devices, a conceptual map with resources, preceding hands-on experiment with LEDs. The experiment verifies the theory and determination of Planck's constant using electroluminescent phenomenon for different color LEDs and proves that important information can be obtained without using expensive materials. This experiment makes a connection between elements of quantum Physics and the physical structure and properties of semiconductor materials through which there occurs a transformation of electrical energy into light energy. It is easy for the experiment to be redone in high schools and it is a very good way to help students understand some of the phenomena. It is quite fascinating to see such fundamental phenomena having such an easily observable manifestation.
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