Noble Physics : What is it about the color BLUE that was - TopicsExpress

Noble Physics : What is it about the color BLUE that was particularly challenging? Well, blue light is at the more energetic end of the visible spectrum, so you need a material that allows electrons to jump across a relatively wide energy gap. (Electrons relinquish energy in such transitions, which generates photons--particles of light.) It was known that Gallium nitride should do the trick, but growing sufficiently large crystals to accomplish the job was tough. Thats where the three new Nobel laureates succeeded, whereas others got hung up. Courtesy : B Greene

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