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Based on a guest question by Vaibhav Bajpai | contribute questions

Nick Holonyak Jr. got lucky with Red in 1962, five years later George Craford found out what makes it Green but it took 27 years to figure out how to make a Blue one. The 2014 Nobel Prize for Physics is a recognition to an effort that has given an energy efficient alternative and a soul to all the smart devices and laptops we use nowadays.

What invention has completed to this journey from Red to Blue?

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This day last year: Q.1113

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