ERIC Number: EJ892053
Record Type: Journal
Publication Date: 2007-Dec
Abstractor: As Provided
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.
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Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Authoring Institution: N/A