In the Red Shadow of the Earth

Autor/inn/en	Hughes, Stephen W.; Hosokawa, Kazuyuki; Carroll, Joshua; Sawell, David; Wilson, Colin
Titel	In the Red Shadow of the Earth
Quelle	In: Physics Education, 50 (2015) 6, S.741-749 (9 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0031-9120
DOI	10.1088/0031-9120/50/6/741
Schlagwörter	Astronomy; Space Sciences; Light; Measurement Techniques; Spectroscopy; Photography; Scientific Concepts; Scientific Principles; Scientific Methodology; Physics + Suchen Sie Ihr Suchwort? Astronomie; Licht; Messtechnik; Spektroskopie; Fotografie; Physik
Abstract	A technique is described for calculating the brightness of the atmosphere of the Earth that shines into the Earth's umbra during a total lunar eclipse making the Moon red. This "Rim of Fire" is due to refracted unscattered light from all the sunrises and sunsets rimming the Earth. In this article, a photograph of the totally eclipsed Moon was compared with the Full Moon and the difference in brightness calculated taking into account the exposure time and ISO setting. The results show that the Full Moon is over 14,000 times brighter than the totally eclipsed Moon. The relative brightness of the eclipsed Moon can be used to estimate that the luminance of the Rim of Fire is over 12 trillion watts. The experiment described in this paper would be suitable as a high school or university exercise. (As Provided).
Anmerkungen	Institute of Physics Publishing. The Public Ledger Building Suite 929, 150 South Independence Mall West, Philadelphia, PA 19106. Tel: 215-627-0880; Fax: 215-627-0879; e-mail: info@ioppubusa.com; Web site: http://journals.iop.org
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2020/1/01