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-   -   total internal reflection - snell's law? (http://www.molecularstation.com/forum/physics-forum/69887-total-internal-reflection-snells-law.html)

Wendy 07-31-2009 03:16 PM

total internal reflection - snell's law?
 
light from air strikes a translucent plastic material. if the light strikes at an angle of 30 degrees to the material and bends by 15 degrees, what is the index of refraction of the plastic.
i obtained an answer of n=1.932, but the book gave an answer of n=1.22, what am i doing wrong? please help and explain in detail.
thanks in advance!


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