Using Smartphone Cameras and Ambient Light Sensors in Distance Learning: The Attenuation Law as Experimental Determination of Gamma Correction

Autor/inn/en	Onorato, Pasquale; Rosi, Tommaso; Tufino, Eugenio; Caprara, Caterina; Malgieri, Massimiliano
Titel	Using Smartphone Cameras and Ambient Light Sensors in Distance Learning: The Attenuation Law as Experimental Determination of Gamma Correction
Quelle	In: Physics Education, 56 (2021) 4, Artikel 045007 (7 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Zusatzinformation	ORCID (Onorato, Pasquale) ORCID (Rosi, Tommaso) ORCID (Malgieri, Massimiliano)
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0031-9120
Schlagwörter	Photography; Handheld Devices; Telecommunications; Light; Distance Education; Open Source Technology; Technology Uses in Education; Science Experiments; Science Instruction; Physics; Measurement; College Science + Suchen Sie Ihr Suchwort? Fotografie; Telekommunikationstechnik; Licht; Distance study; Distance learning; Fernunterricht; Technology enhanced learning; Technology aided learning; Technologieunterstütztes Lernen; Teaching of science; Science education; Natural sciences Lessons; Naturwissenschaftlicher Unterricht; Physik; Messverfahren
Abstract	In times of the explosion of distance learning, because of emergency due to the pandemic, smartphone sensors and cameras are extremely valuable for teachers as they allow students to perform significant experimental activities in their own homes. The open-source software Tracker can be used in combination with the smartphone camera to perform measurements not only of mechanics activities, but also of optics. In the latter case, it is not always easy for students to understand how the pixel brightness which can be inferred from the taken photos are related to actual physical light intensity. In this paper we present a simple experiment to verify the exponential decay in the intensity of light going through successive sheets of a material (the Lambert law) with two different methods, i.e. using either the smartphone light sensor or the smartphone camera and Tracker. Besides its theoretical significance, the experiment constitutes a useful tool for calibrating the camera/Tracker combination to use it for different experiments. (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2024/1/01