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- Willoughby_Smith abstract "Willoughby Smith (6 April 1828, Great Yarmouth, Norfolk — 17 July 1891, Eastbourne, Sussex) was an English electrical engineer who discovered the photoconductivity of the element selenium. This discovery led to the invention of photoelectric cells, including those used in the earliest television systems.In 1848, he began working for the Gutta Percha Company, London where he developed iron and copper wires insulated with gutta-percha to be used for telegraph wires. In 1849, Smith superintended the manufacture and laying of 30 miles of underwater telegraph wire from Dover to Calais. He worked closely with Charles Wheatstone who had designed the machinery for making and laying the cable. The project was a success and over the following decades, Smith and the company he worked for were involved with many other underwater telegraph cable projects.In 1873, Smith developed a method for continually testing an underwater cable as it was being laid. For his test circuit, he needed a semi-conducting material with a high resistance and selected selenium rods for this purpose. The selenium seemed to do the job properly, except in actual use, the device gave inconsistent results. Upon investigation, it was discovered that the conductivity of the selenium rods increased significantly when exposed to strong light. Smith described the \"Effect of Light on Selenium during the passage of an Electric Current\" in an article that was published in the 20 February 1873 issue of Nature.".
- Willoughby_Smith thumbnail Willoughby_Smith.jpg?width=300.
- Willoughby_Smith wikiPageExternalLink index.htm.
- Willoughby_Smith wikiPageExternalLink smith.html&date=2009-10-26+20:59:44.
- Willoughby_Smith wikiPageID "5270396".
- Willoughby_Smith wikiPageLength "3152".
- Willoughby_Smith wikiPageOutDegree "23".
- Willoughby_Smith wikiPageRevisionID "708113325".
- Willoughby_Smith wikiPageWikiLink Calais.
- Willoughby_Smith wikiPageWikiLink Category:1828_births.
- Willoughby_Smith wikiPageWikiLink Category:1891_deaths.
- Willoughby_Smith wikiPageWikiLink Category:19th-century_British_engineers.
- Willoughby_Smith wikiPageWikiLink Category:19th-century_English_people.
- Willoughby_Smith wikiPageWikiLink Category:English_electrical_engineers.
- Willoughby_Smith wikiPageWikiLink Category:People_from_Great_Yarmouth.
- Willoughby_Smith wikiPageWikiLink Category:Selenium.
- Willoughby_Smith wikiPageWikiLink Category:Submarine_communications_cables.
- Willoughby_Smith wikiPageWikiLink Charles_Wheatstone.
- Willoughby_Smith wikiPageWikiLink Dover.
- Willoughby_Smith wikiPageWikiLink Eastbourne.
- Willoughby_Smith wikiPageWikiLink Electrical_engineering.
- Willoughby_Smith wikiPageWikiLink Great_Yarmouth.
- Willoughby_Smith wikiPageWikiLink Gutta-percha.
- Willoughby_Smith wikiPageWikiLink Norfolk.
- Willoughby_Smith wikiPageWikiLink Photoconductivity.
- Willoughby_Smith wikiPageWikiLink Selenium.
- Willoughby_Smith wikiPageWikiLink Solar_cell.
- Willoughby_Smith wikiPageWikiLink Sussex.
- Willoughby_Smith wikiPageWikiLink Telegraphy.
- Willoughby_Smith wikiPageWikiLink File:Willoughby_Smith.jpg.
- Willoughby_Smith wikiPageWikiLinkText "Smith".
- Willoughby_Smith wikiPageWikiLinkText "Willoughby Smith".
- Willoughby_Smith wikiPageUsesTemplate Template:Authority_control.
- Willoughby_Smith wikiPageUsesTemplate Template:England-engineer-stub.
- Willoughby_Smith wikiPageUsesTemplate Template:For.
- Willoughby_Smith wikiPageUsesTemplate Template:Reflist.
- Willoughby_Smith wikiPageUsesTemplate Template:Use_British_English.
- Willoughby_Smith wikiPageUsesTemplate Template:Use_dmy_dates.
- Willoughby_Smith subject Category:1828_births.
- Willoughby_Smith subject Category:1891_deaths.
- Willoughby_Smith subject Category:19th-century_British_engineers.
- Willoughby_Smith subject Category:19th-century_English_people.
- Willoughby_Smith subject Category:English_electrical_engineers.
- Willoughby_Smith subject Category:People_from_Great_Yarmouth.
- Willoughby_Smith subject Category:Selenium.
- Willoughby_Smith subject Category:Submarine_communications_cables.
- Willoughby_Smith hypernym Engineer.
- Willoughby_Smith type Person.
- Willoughby_Smith type Scientist.
- Willoughby_Smith type Communication.
- Willoughby_Smith type Element.
- Willoughby_Smith type Scientist.
- Willoughby_Smith type Thing.
- Willoughby_Smith comment "Willoughby Smith (6 April 1828, Great Yarmouth, Norfolk — 17 July 1891, Eastbourne, Sussex) was an English electrical engineer who discovered the photoconductivity of the element selenium. This discovery led to the invention of photoelectric cells, including those used in the earliest television systems.In 1848, he began working for the Gutta Percha Company, London where he developed iron and copper wires insulated with gutta-percha to be used for telegraph wires.".
- Willoughby_Smith label "Willoughby Smith".
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- Willoughby_Smith sameAs Willoughby_Smith.
- Willoughby_Smith sameAs Willoughby_Smith.
- Willoughby_Smith sameAs Willoughby_Smith.
- Willoughby_Smith sameAs Willoughby_Smith.
- Willoughby_Smith sameAs m.0dbtv_.
- Willoughby_Smith sameAs Смит,_Уиллоуби.
- Willoughby_Smith sameAs Willoughby_Smith.
- Willoughby_Smith sameAs Willoughby_Smith.
- Willoughby_Smith sameAs Q434488.
- Willoughby_Smith wasDerivedFrom Willoughby_Smith?oldid=708113325.
- Willoughby_Smith depiction Willoughby_Smith.jpg.
- Willoughby_Smith isPrimaryTopicOf Willoughby_Smith.