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1 BCE
Sun
The blue light was there in the sun -
Period: to
The sun has blue light was discovered
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When was blue light invented
Professors Isamu Akasaki, Hiroshi Amano and Shuji Nakamura made the first blue LEDs in the early 1990s. This enabled a new generation of bright, energy-efficient white lamps, as well as colour LED screens. -
All gadgets have blue light
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Working on blue light
Some scientists are working on making blue light not harmful -
All gadgets will be non harmful
