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Selenium and the photoconductive effect
This might not be in the right forum, but I have a couple of questions regarding the discovery of the photoconductive properties of selenium.
I have read that in 1873 Willoughby Smith was using rods of selenium in checking underwater telegraph cables when he noticed the electrical resistance changed when they were exposed to light. Does anyone know how these rods were used exactly to check underwater cable? Also, from what I can gather, this appears not to have been a new method, so why didn't anyone notice it before?
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One Ruthie At A Time |
#2
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Google is your friend:
http://books.google.com/books?id=7eU...0cable&f=false |
#3
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Not today it isn't. The page wouldn't display.
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One Ruthie At A Time |
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When I was in high school, selenium rectifiers were fun when you exceeded their ratings...
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Reception Reports for Channel 37 TVDX Can Not Only Get You a QSL Card, but a One-Way Trip to the Planet Davanna is a Real Possibility... |
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Smelly too, I'd imagine....
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Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4 |
Audiokarma |
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