laser

     

A laser is an electronic-optical evice that emits coherent light radiation. The term "laser" is an acronym for Light Amplification by Stimulated Emission of Radiation. A typical laser emits light in a narrow, low-divergence beam, with a narrow wavelength spectrum ("monochromatic" light). In this respect, laser light is in sharp contrast with such light sources as the incandescent light bulb, which emits light over a wide area and over a wide spectrum of wavelengths.

Trivia about laser

  • An American, Theodore Maiman, built the first of these light-amplifying devices in 1960
  • This type of light can drill holes in diamonds or carry information over long distances
  • (Kelly of the Clue Crew reports from Haleakala Observatory in Maui, Hawaii.) The unit here fires pulses of light at mirrors on the moon & man-made satellites; the pulses reflect back to earth, allowing distances to be precisely measured; it's called an LRS, this type of ranging system
  • Nobel Laureate Ahmed Zewail uses bursts of light from this device to study chemical reactions
  • First built in 1960, it's also been called an optical maser
  • The ruby type of this device is used to remove liver spots & tattoos
  • 2010 marked 50 years of this device, which has revolutionized eye surgery & outdoor light shows
  • Police now use speed guns with this technology first constructed by Theodore Maiman using a ruby rod
  • Gallium arsenide is used in the semiconductor type of this device found in CD players
  • In 1960 Theodore Maiman built the first of these devices using a ruby
  • (Jimmy of the Clue Crew with robot "Grace" at Carnegie-Mellon University in Pittsburgh) One of the ways Grace avoids obstacles is by scanning with this narrow beam of light
  • In 1997 Dr. Steven Chu won a Nobel Prize for slowing down atoms using one of these amplified light beams
  • By the end of the Vietnam War, the USAF was guiding bombs with this acronymic technology dating from around 1960

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