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

    Your name: Your email*:
    Comment on the question:

    I have been receiving large quantities of spam through this comment fonctionality, which is particularily dumb from the spammers since nobody but me ever gets to see the comments in question, and I am interested neither in porn nor gambling websites.
    As a result, I am forced to add a verification process. Please answer the question below to prove you are not a spamming bot:

    What is the capital of Japan?

    Answer:

    *Only if you want me to be able to contact you concerning your comment