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the greatest angle of incidence for which a wave propagating in a homogeneous medium of relatively high refractive index strikes an interface with a medium having a lower refractive index, and for which refraction is just possible
Note – When light propagates in a homogeneous medium of relatively high refractive index (nhigh) onto a planar interface with a homogeneous material of lower index (nlow ), the critical angle is defined by :
arcsin (nlow / nhigh) |
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