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Why It Was Almost Impossible to Make the Blue LED (youtu.be)

submitted 9 months ago by Whirling_Cloudburst@lemmy.world to c/technology@lemmy.world

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The blue LED was supposed to be impossible—until a young engineer proposed a moonshot idea.

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[–] JATtho@lemmy.world 63 points 9 months ago (22 children)

This was an yet another glorious episode from veritasium.

I hope we get well past UVC LEDs. (i.e., shorter wavelengths) UV LEDs are already available. Unfortunately, this progress will stop before X-ray light. With +1 KeV energy, you pretty much must blast off the electrons from the atoms to emit X-rays, which an x-ray tube already does. Or by peeling off a piece of scotch tape.

[–] TonyTonyChopper@mander.xyz 18 points 9 months ago

More efficient compact X-ray generators would be pretty huge for science work. We run the diffractometer in my lab at 2 kW and it still takes hours to get a good quality scan

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