A Practical Classroom iPad Shadowgraph System

Autor/inn/en	Gearhart, Bradley; MacIsaac, Dan
Titel	A Practical Classroom iPad Shadowgraph System
Quelle	In: Physics Teacher, 58 (2020) 1, S.8-11 (4 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0031-921X
Schlagwörter	Light; Physics; Science Instruction; Visualization; Science Experiments; Handheld Devices; High School Students; Telecommunications; Standards; Teaching Methods; Photography + Suchen Sie Ihr Suchwort? Licht; Physik; Teaching of science; Science education; Natural sciences Lessons; Naturwissenschaftlicher Unterricht; Visualisation; Visualisierung; High school; High schools; Student; Students; Oberschule; Schüler; Schülerin; Studentin; Telekommunikationstechnik; Standard; Teaching method; Lehrmethode; Unterrichtsmethode; Fotografie
Abstract	Light rays refract when passing through pockets of transparent fluids with different indices of refraction such as ordinary air pockets of varying temperature. This phenomenon makes night stars twinkle, distorts views above hot asphalt roads and hot barbeque grills, and provides an opportunity for visualizing the normally invisible movement of transparent gases and liquids. Schlieren and shadowgraph imaging allows for visualizing transparent gas density variations, allowing ordinarily unseen phenomena to be imaged and experimented with in real time. Traditional Schlieren systems require expensive equipment (DSLR camera, telephoto lens, several high-quality mirrors, an adjustable knife edge) and are difficult to align, 1-3 while shadowgraph systems trade simplicity for image sensitivity. We outline a simplified classroom shadowgraph system that uses only a single telescope mirror, an LED flashlight, and an iPad to teach topics in high school science. (As Provided).
Anmerkungen	American Association of Physics Teachers. One Physics Ellipse, College Park, MD 20740. Tel: 301-209-3300; Fax: 301-209-0845; e-mail: pubs@aapt.org; Web site: http://aapt.scitation.org/journal/pte
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2024/1/01