World Journal of Chemical Education
ISSN (Print): 2375-1665 ISSN (Online): 2375-1657 Website: http://www.sciepub.com/journal/wjce Editor-in-chief: Prof. V. Jagannadham
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World Journal of Chemical Education. 2015, 3(4), 87-92
DOI: 10.12691/wjce-3-4-2
Open AccessArticle

Experimental Determination of Planck’s constant using Light Emitting Diodes (LEDs) and Photoelectric Effect

Andrea Checchetti1, and Alessandro Fantini2

1Istituto d'Istruzione Superiore "Leonardo da Vinci"

2Liceo Scientifico "E. Fermi" Catanzaro Lido

Pub. Date: August 06, 2015

Cite this paper:
Andrea Checchetti and Alessandro Fantini. Experimental Determination of Planck’s constant using Light Emitting Diodes (LEDs) and Photoelectric Effect. World Journal of Chemical Education. 2015; 3(4):87-92. doi: 10.12691/wjce-3-4-2

Abstract

The aim of this experiment was to utilize the Inquiry Based Science Education, (IBSE) in order to offer the students a better understanding of the light-matter interaction. The inquiry-based teaching addresses the question of how the students make observations, develop hypotheses about phenomena, and devise tests to investigate their hypotheses. Using IBSE they share responsibility within the group for what concerns answering questions, and use a scientific approach to solve problems. 4th year students of undergraduate degree program of an Italian Arts Lyceum and 5th year students of undergraduate degree program of an Italian Scientific Lyceum have experimentally determined the value of Planck's constant, h. They have used respectively two methods: a) current-voltage measurements of a series of different colored LEDs; b) a method based upon the comparison of the incident light beams values of potential arrest with different wavelength on a photo emissive surface, using the photoelectric effect through an apparatus built on an optical bench. This work is an essential part of an apprenticeship developed during the “Professione Formatore in Didattica delle Scienze” Master, which takes place at the University of Calabria, with the authors taking part in it as trainees and that will be over in the month of October 2015.

Keywords:
IBSE (Inquiry-Based Science Education) planck’s constant LEDs (Light-emitting diodes) photoelectric effect

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References:

[1]  Bell, T. Urhahne, D., Schanze, S. & Ploetzner, R., (2010) Collaborative Inquiry learning: Models, tools and challenges, International Journal of science education, 32(3), pp. 349-377.
 
[2]  Maria Rute de Amorim e Sá Ferreira André and Paulo Sérgio de Brito André, “Classroom fundamentals: measuring the Planck constant”, online available on Science in School, http://www.scienceinschool.org/2014/issue28/planck.
 
[3]  Cloninger, T. Zhou, F. “Computer-Based Experiment for Determining Planck's constant Using LED's” The Physics Teacher. 46. (2008): 413-415.
 
[4]  Raymond A. Serway “Physics for Scientists and Engineers” S.E.S. (1986): 557-560.
 
[5]  David Halliday, Robert Resnick “Fisica” C.ed. Ambrosiana (1966): 591-595.