AY Honors/Lighthouses - Advanced/Answer Key
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Revision as of 04:13, 13 November 2007 by Jomegat (talk | contribs) (→3. List the development of a Fresnel lens, including:)
1. Have the Lighthouses Honor
2. Make a scrapbook including the following:
a. Pictures, post cards or drawings of twenty-five lighthouses. Label should included a brief description of: location, year built, active/non-active status, and order of the lens.
b. Write up a short history of the above lighthouses.
c. Include drawings/pictures and answers to all the requirements for this honor in your scrapbook.
3. List the development of a Fresnel lens, including:
a. Name of the gentleman that invented it.
b. Country that he came from
c. Year developed
Augustin-Jean Fresnel (pronounced fray-NELL) is most often given credit for the development of this lens for use in lighthouses.
Fresnel (May 10, 1788 – July 14, 1827), was a French physicist who contributed significantly to the establishment of the theory of wave optics.
According to Smithsonian, the first Fresnel lens was used in 1822 in a lighthouse on the Gironde River in France, Cardovan Tower; its light could be seen from more than 20 miles out.