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ERIC Number: EJ1004652
Record Type: Journal
Publication Date: 2013-Jan
Pages: 4
Abstractor: As Provided
Reference Count: 9
ISSN: ISSN-0031-921X
Demonstrating Sound Wave Propagation with Candle Flame and Loudspeaker
Hrepic, Zdeslav; Nettles, Corey; Bonilla, Chelsea
Physics Teacher, v51 n1 p16-19 Jan 2013
The motion of a candle flame in front of a loudspeaker has been suggested as a productive demonstration of the longitudinal wave nature of sound. The demonstration has been used also as a research tool to investigate students' understanding about sound. The underpinning of both applications is the expectation of a horizontal, back-and-forth vibration of the flame around its upright position. Unlike experts, who regularly anticipate this outcome, students with no previous formal knowledge typically anticipate that the flame will lean away from the speaker. (Contains 1 table and 12 figures.)
American Association of Physics Teachers. One Physics Ellipse, College Park, MD 20740. Tel: 301-209-3300; Fax: 301-209-0845; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A