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الكتب الكتب 1 - 2 من 2 في... similar mediums be separated from each other by a space terminated on both sides....
" ... similar mediums be separated from each other by a space terminated on both sides by parallel planes, and a body in its passage through that space be attracted or impelled perpendicularly towards either of those mediums, and not agitated or hindered... "
Cambridge Problems: Being a Collection of the Printed Questions Proposed to ... - الصفحة 102
1821 - عدد الصفحات: 425
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Encyclopædia metropolitana; or, Universal dictionary of knowledge ..., المجلد 3

Edward Smedley - 1845
...attracted or impelled perpendicularly to- |a wards either medium, and is not agitated or hindered facti«. by any other force ; and the attraction is every where...either plane, taken towards the same side of the plane ; then will the sine of incidence on either plane be to the sine of emergence from the other plane...
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The Mysterious Universe

James Hopwood Jeans - 1944 - عدد الصفحات: 142
...towards either of those mediums, and not agitated or hindered by any other force ; and the attraction be every where the same at equal distances from either plane, taken towards the same hand of the plane ; I say, that the sine of incidence upon either plane will be to the sine of emergence...
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