The World Today - Comment


Question 240: Of the following, which is the closest definition of a laser?
Author: K. - Category: Technology
Difficulty: 2/5 - Zone: World

  • A device that produces coherent light with a narrow range of wavelengths
  • A device that produces extremely intense light
  • A device that projects electrons at high speed
  • A device that polarize photons, propelling them by magnetic repulsion

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