Checked content

File:DanielColladon's Lightfountain or Lightpipe,LaNature(magazine),1884.JPG

Author: Jean-Daniel Colladon (1802-1893). Source: This illustration appears in "La Nature" magazine in 1884 and it is reproduced in modern-day accounts of the history of fibre optics including Jeff Hecht's book Story of Fibre Optics and i-fiberoptics.com. Collodon first described the system in an article in "Comptes Rendus" 1842, and described it again in 1884 in "La Nature". In the above illustration, water comes out of a short spout on the watertank and then falls through open air, as in a fountain. The device on the illustration's lefthand side produces light and directs a beam of light into the watertank. The demonstration of this "light fountain" needs to be done in a darkened room to see the effect.

Licensing:

Public domain This image (or other media file) is in the public domain because its copyright has expired.

This applies to Australia, the European Union and those countries with a copyright term of life of the author plus 70 years.

Dialog-warning.svg You must also include a United States public domain tag to indicate why this work is in the public domain in the United States. Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Colombia has 80 years, and Guatemala and Samoa have 75 years, Russia has 74 years for some authors. This image may not be in the public domain in these countries, which moreover do not implement the rule of the shorter term. Côte d'Ivoire has a general copyright term of 99 years and Honduras has 75 years, but they do implement the rule of the shorter term.
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.

Original upload history

This file was originally uploaded at en.wikipedia as DanielColladon's Lightfountain or Lightpipe,LaNature(magazine),1884.JPG, before it was transfered to Commons.

Upload date User Bytes Dimensions Comment
2009-02-08 22:10:52 Seanwal111111 78802 458×737 Author: Jean-Daniel Colladon (1802-1893). Source: This illustration appears in ''"La Nature"'' magazine in 1884 and it is reproduced in modern-day accounts of the history of fibre optics including [http://books.google.fm/books?id=_G8B_lU_UHEC&pg=PA13&lpg
The following pages on Schools Wikipedia link to this image (list may be incomplete):

What is Schools Wikipedia?

Wikipedia for Schools brings Wikipedia into the classroom. SOS Children works in 133 countries and territories across the globe, helps more than 62,000 children, and reaches over 2 million people in total. There are many ways to help with SOS Children.