Difference between revisions of "AY Honors/Lighthouses - Advanced/Answer Key"
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< AY Honors | Lighthouses - AdvancedAY Honors/Lighthouses - Advanced/Answer Key
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===b. Write up a short history of the above lighthouses.=== | ===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.=== | ===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: | + | ==3. List the development of a Fresnel lens, including: <br>a. Name of the gentleman that invented it. <br>b. Country that he came from <br>c. Year developed== |
− | + | [[Image:Afresnel.jpg|thumb|Augustin-Jean Fresnel]] | |
− | + | 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. | ||
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==4. Draw a Fresnel lens:== | ==4. Draw a Fresnel lens:== | ||
===a. Show how prisms are used to concentrate light=== | ===a. Show how prisms are used to concentrate light=== |
Revision as of 04:13, 13 November 2007
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.