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A few really quick questions about light from a physics noob.

  1. Mar 24, 2010 #1
    I have no idea about physics relating to light. I have just a couple questions for you guys.

    First, what can be done to change the wavelength of light from the visible spectrum to the IR spectrum? And how does it actually work?

    Second, how exactly are lasers created and what determines the intensity.

    I'm not really looking for a super high tech definition. Just a very basic explanation. And maybe some good links that could provide further reading.

    Thanks for any responses.
  2. jcsd
  3. Mar 24, 2010 #2
    Changing the frequency can be done by changing the medium the light is passing through or by the doppler effect in extremely large distances.

    As for the lasers, this is taken from Dr. Michio Kaku's book Physics of the Impossible:
  4. Mar 25, 2010 #3
    The frequency stays the same when going from one medium to another ,
    you can change the wavelength with gravitational red shift .
    or by passing it trough a fluorescent material.
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