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Internal Reflection / Fiber Optics
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[QUOTE="collinsmark, post: 5486754, member: 114325"] I suggested aligning the light ray tangent to the inner radius [I]because[/I] it is the extremum (i.e., it is an extreme case). Whenever the problem asks you to look for "maximum <something>" or "minimum <something>", it's an indication that you might want to consider aligning the light ray in one of its exreme cases. :smile: [Edit: that is: an extremum that makes logical sense; you don't have to worry about aligning the light ray into physically impossible configurations, but you do want to look for cases at the physical limits.] [/QUOTE]
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Internal Reflection / Fiber Optics
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