It's a bird… it's a plane… it's a blue meteor? Fireball? Piece of a comet? Whatever it was, it lit up the night sky for millions of people early Sunday morning in Spain and Portugal. Social media ...
It’s hard to believe that the first blue LED didn’t arrive until 1993. They look simple, but looks are deceiving (Fig. 1). 1. Image showing a blue InGaN-based LED with gold wire contacts (0.4 × 0.4 mm ...
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