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Negative Birefringence

September 10, 2007

Liquid crystals are found to be birefringent, due to their anizotropic nature. That is, they demonstrate double refraction (having two indices of refraction). Light polarized parallel to the director has a different index of refraction (that is to say it travels at a different velocity) than light polarized perpendicular to the director.

Negative birefringence – yellow when is parallel to the light, and blue when is perpendicular.

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6 Comments leave one →
  1. March 27, 2008 11:27 am

    I don’t like this post. Gotta fix it…

  2. April 4, 2008 7:27 pm

    The mnemonic is good but the picture is not. Post this with Gout.

  3. April 5, 2008 5:39 pm

    Thanks! Yes, I made it for negative birefringence of gout crystals. Can you send a good picture for that post?

  4. February 20, 2009 12:39 am

    click on image to see , good image

  5. thomas permalink
    April 8, 2010 9:41 am

    Thank you for the post. Got finals tomorrow and misplaced my notes on birefringence. I’m in your debt

  6. May 30, 2011 11:06 pm

    Do any of you guys have the discount code for USMLE STEP 1 & 2 TOTAL REVIEW software on usmlestep.net ? I emailed their support asking for the discount code, but did not get a response yet.

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