The first visible-spectrum (red) LED was developed in 1962 by Nick Holonyak, Jr., while working at General Electric Company. Holonyak first reported his LED in the journal Applied Physics Letters on the December 1, 1962. M. George Craford, a former graduate student of Holonyak, invented the first yellow LED and improved the brightness of red and red-orange LEDs by a factor of ten in 1972. In 1976, T. P. Pearsall created the first high-brightness, high-efficiency LEDs for optical fiber telecommunications by inventing new semiconductor materials specifically adapted to optical fiber transmission wavelengths. COUNT 5
QSN1 At what global company was the first visible-spectrum LED developed? ANS1 General Electric Company QSN2 What GE employee developed the visible-spectrum LED? ANS2 Nick Holonyak, Jr. QSN3 What color is associated with the visible-spectrum LED? ANS3 red QSN4 What color LED was later created in 1972? ANS4 yellow QSN5 What graduate student of Holonyak created the yellow LED? ANS5 M. George Craford