The Skeptics Guide #483 - Oct 11 2014
The Skeptics' Guide to the Universe
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The Blue LED - It's a New Way to Make White Light
The invention of this blue LED came in 1994. It also gave us a new way to make all the other colors as well and a way to control them dynamically, which is very key to LEDs. There were two other instances of researchers creating blue LEDs earlier than these guys 1971 and 1989.
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