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Total internal reflection for a long time

  1. Jan 23, 2014 #1
    Imagine a square prism made from some material with such an index of refraction and surrounded by a substance of such index of refraction so that light rays entering the prism and hitting one of the internal sides of the prism at an angle of incidence 45° experience total internal reflection. And since the internally reflected light rays reflect at an angle of also 45°, and the prism is a square one (90°) ,they also get internally reflected at the adjacent side of the square prism. And this goes on until all the light is slowly absorbed by the material of the prism.


    I know it's the same idea as the optical fibers, but I am wondering what we would see in such a prism. Will light going in a loop show interference patterns? and if it doesn't, How bright are the trapped rays going to be combined before the first of them is absorbed ?
     
    Last edited: Jan 23, 2014
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  3. Jan 23, 2014 #2

    CWatters

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  4. Jan 23, 2014 #3
    Please note that in my question i assume the incident ray to be from a monochromatic source with great enough coherent time (say a very good laser ).
     
  5. Jan 24, 2014 #4

    CWatters

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    Then yes you might get interference.
     
  6. Jan 24, 2014 #5

    Claude Bile

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    Google "Whispering Gallery modes".

    Claude.
     
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