Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Two slit interference and diffraction

  1. Mar 3, 2005 #1
    why is it better to use red light , instead of blue or white light, for 2 slit interference and diffraction measurements?
     
  2. jcsd
  3. Mar 3, 2005 #2

    dextercioby

    User Avatar
    Science Advisor
    Homework Helper

    It's better for the radiation to be monochromatic (laser beam,if possible),so white light is outta the question.As for what color,maybe the fringes look better in red...?

    Daniel.

    P.S.Neon laser is pretty common in optics.That line is in the red part of spectrum.
     
  4. Mar 6, 2005 #3

    Claude Bile

    User Avatar
    Science Advisor

    Red HeNe lasers are very cheap. Blue lasers, on the other hand are very expensive.

    Claude.
     
  5. Mar 6, 2005 #4
    Red laser light also has a larger wavelength than blue light. Therefore creating a larger seperation in the fringes, allowing for a magnifies effect.


    Regards,

    Nenad
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?