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WBCS Preliminary Examination 2015 — General Studies · Question 83 of 200

Q83
General SciencePhysics
2014 Noble award in physics is associated with the invention of which type of LED?
  1. a.Blue
  2. b.Green
  3. c.Red
  4. d.Yellow

Answer: (A) Blue

The 2014 Nobel Prize in Physics was awarded to Isamu Akasaki, Hiroshi Amano, and Shuji Nakamura for the invention of efficient blue light-emitting diodes (LEDs). Blue LEDs were the missing piece needed to create white LED light, enabling energy-saving bright lighting that has revolutionised global illumination.

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2014 Noble award in physics is associated with the invention of whi… — WBCS Preliminary Examination 2015 Q83 | Prostuti360°