Sin i / Sin r = (BC/AC) / (AD/AC)
Sin i / Sin r = BC/AD
Sin i / Sin r = Cm.t /Ca.t = Cm / Ca
AD<AC AD=AC AD>AC
1.(AD/AC) < 1 (AD/AC) = 1 (AD/AC) > 1
2.Sin r < 1 Sin r = 1 Sin r > 1
3.r < Sin-1(1) r = Sin-1(1) r > Sin-1(1)
4.r < 900 r = 900 r > 900
5.i < C (critical angle) i = C i > C
6.Refracted wavefront Refracted wavefront Refracted wavefront
is possible is just possible,the is not possible
refracted ray grazes
the surface of separation
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