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" ... that the ratio of the sines of the angles of incidence and refraction is constant for refraction in the same medium, was effected by Snell and Descartes. "
Manual of optics, by J.A. Galbraith and S. Haughton - Page 22
by Joseph Allen Galbraith - 1854
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The Present State of the Republick of Letters. ...

Bibliography - 1734
...fucb a manner, that they may all converge to the fame Point in its Axis, or unite in one Focus nearly, The Ratio of the Sines of the Angles of Incidence and Refraction of the fever al Sorts of Rays being refpeftively given, and allowed conflant and immutable, according...
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A Plain Elementary and Practical System of Natural Experimental Philosophy ...

John Ewing - Astronomy - 1809 - 538 pages
...but a point. Let x=the sine of the angle of incidence, and therefore VI — xx=its cosine, r=l; put the ratio of the sines of the angles of incidence and refraction, as 1 : p, then 1 : p : : x : px=the sine of the angle of refraction; and Vl — pjx"= its cosine. The...
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A Treatise on New Philosophical Instruments, for Various Purposes ..., Volume 1

David Brewster - Color - 1813 - 427 pages
...and the sun's altitude, observed at the same time, he found the angle of refraction, and consequently the ratio of the sines of the angles of incidence and refraction, for the mean refrangible rays. The celebrated Euler suggested a method of measuring the refractive...
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The American Journal of Science and Arts

Geology - 1861
...fathom-intervals are exaggerated nearly in the ratio of 6 to 8 or 3 to 4 : — that is, sensibly in the ratio of the sines of the angles of incidence and refraction for water. This is only true for small angles of incidence, that is, for the lower fathoms ; for, in...
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The Life of Sir Isaac Newton

David Brewster - Physicists - 1831 - 323 pages
...air, and in the case of glass or mica at Tj'jj of that thickness ; the numbers 1.336, 1.525 expressing the ratio of the sines of the angles of incidence and refraction in the substances which produce the colours. From the phenomena thus briefly described, Sir Isaac Newton...
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The Elements of Physics

Thomas Webster - Physics - 1837 - 490 pages
...one medium to another, the change which takes place in if" direction is expressed by saying, that ' the ratio of the sines of the angles of incidence and refraction is invariable for the same medium.' This we shall endeavour to explain. Let a vessel which is a hemisphere...
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History of the Inductive Sciences: From the Earliest to the ..., Volume 1

William Whewell - Science - 1837 - 546 pages
...difference of less than half a degree each way. When we consider how simple the law of refraction is, (that the ratio of the sines of the angles of incidence and refraction is constant for the same medium,) it appears strange that a person attempting 5 Optica, p. 411. " LUK...
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The Edinburgh Review: Or Critical Journal, Volume 66

1838
...difference of less than half a degree each way. ' When we consider how simple the law of refraction is (that the ratio of the sines of the angles of incidence and refraction is constant for the same medium), it appears strange that a person attempting to discover it, and drawing...
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The Family Library (Harper)., Volume 26

Child rearing - 1845
...air, and in the case of glass or mica atT.Tjfjj of that thickness; the numbers 1.336, 1.525 expressing the ratio of the sines of the angles of incidence and refraction in the substances which produce the colours. From the phenomena thus briefly described, Sir Isaac Newton...
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A Rudimentary Treatise on the History, Construction, and Illumination of ...

Alan Stevenson - Lighthouses - 1850 - 204 pages
...assumes the form * The truth of the first of these equations (sin = m . sin 7) which merely expresses the ratio of the sines of the angles of incidence and refraction is obvious ; but owing to the great number of small angles about C, a little consideration may be required...
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