IJPAM: Volume 78, No. 5 (2012)
Department of Business Information
Faculty of Information Management
Osaka University of Economics
2, Osumi Higashiyodogawa Osaka, 533-8533, JAPAN
Abstract. This paper explains why some fans appear to rotate backwards because of a stroboscopic effect. The phenomenon is often seen with fans in movies. After estimating fan rotation by mathematical formulae, many applications of stroboscopes are shown.
Received: February 8, 2012
AMS Subject Classification: 00A08, 00A09, 97A20
Key Words and Phrases: stroboscopic effect, virtual rotation, alternating current, movie frames
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Source: International Journal of Pure and Applied Mathematics
ISSN printed version: 1311-8080
ISSN on-line version: 1314-3395