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Why It Was Almost Impossible to Make the Blue LED

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patentlymn:
https://youtu.be/AF8d72mA41M
 Why It Was Almost Impossible to Make the Blue LED
Veritasium

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   https://youtu.be/AF8d72mA41M
14,463,705 views  Feb 8, 2024
The blue LED was supposed to be impossible—until a young engineer proposed a moonshot idea.

Libertas:
Re: LEDs, which are everywhere...a study was done that indicates they lead to macular degeneration...

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