sin(i) / sin(r) = n1/n2 = n12 by dariusz szczygielski from poland
designer's own words:
[ sin(i) / sin(r) = n1/n2 = n12 ]
: Refraction of Light :
: sin(i) / sin(r) = n1/n2 = n12
: sin(i) / sin(r) = n1/n2 = n12
: sin(i) / sin(r) = n1/n2 = n12
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