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[Post New]17 Aug 2007 13:57:26 IST
    Subject: refraction
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apples (0)

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a uniform,horizontal beam of light is incident upon a quarter cylinder of radius R = 5cm,and has a refractive index of 2/3.
a patch on the table for a distance 'x' from the cylinder is unilluminated
find the value of    
x
    
 

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