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F = (1/4)(n2/n1)2[1-{(n1-n2)/(n1+n2)}2] ??

  1. Oct 22, 2015 #1
    Hi,I was wondering if someone could tell me the name of this equation, where does the equation come from?
    “If light is isotropically generated in a medium then the fraction transmitted to the outside world is given by:
    F = (1/4)(n2/n1)2[1-{(n1-n2)/(n1+n2)}2]”

    Thank you so much :)
     
  2. jcsd
  3. Oct 23, 2015 #2

    Simon Bridge

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    Welcome to PF;
    Where did you find the equation?
    Something to do with LEDs?

    It looks like a transmission coefficient or optical efficiency relation... it probably does not have a special name: most equations don't. Why does it matter what an equation is called?
     
  4. Oct 25, 2015 #3
    Hi, it's about LED. I saw this equation somewhere, I cant remember where, but I thought I would look into it so I can understand it and maybe read a bit more about it. Thanks
     
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