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Wave diffraction

  1. Oct 23, 2010 #1
    I wonder is there any application for diffraction and diffraction grating in daily life except for lab purposes?:bugeye:
     
  2. jcsd
  3. Oct 23, 2010 #2
    They are widely used in fiber optics networks. WDM (wavelength division multiplexing) allows many different wavelengths to be transmitted simultaneously through a single fiber. When the wavelengths need to be separated, a diffraction grating is used. They are no doubt being used to transmit these very words. I'm sure there are numerous other applications in telecom alone.
     
  4. Oct 23, 2010 #3

    Andy Resnick

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    Nearly every spectroscopic application uses diffraction. Modern confocal microscopes use it to select fluorescence lines, as well.

    But those are in the lab- everyday instances of diffraction include security holograms (the kind on credit cards, etc.) at optical wavelengths.
     
  5. Oct 25, 2010 #4
    Can you explain more detail about how actually credit card applies diffraction of light? Thanks.
     
  6. Oct 25, 2010 #5

    Andy Resnick

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