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50 Years of ERIC
50 Years of ERIC
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ERIC Number: EJ892053
Record Type: Journal
Publication Date: 2007-Dec
Pages: 2
Abstractor: As Provided
Reference Count: 4
ISBN: N/A
ISSN: ISSN-0031-921X
Fresnel's Lighthouse Lenses
Greenslade, Thomas B., Jr.
Physics Teacher, v45 n9 p550-551 Dec 2007
One of the rewards of walking up the scores of steps winding around the inside of the shaft of a lighthouse is turning inward and examining the glass optical system. This arrangement of prisms, lenses, and reflectors is used to project the light from a relatively small source in a beam that can be seen far at sea.
Descriptors: Optics, Science Instruction, Light, Physics, Motion, Scientific Principles
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://scitation.aip.org/tpt
Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers: N/A