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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. "
The Life of Sir Isaac Newton - Página 78
por Sir David Brewster - 1832 - 323 páginas
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The Present State of the Republick of Letters. ...

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 - 1809 - 538 páginas
...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 ..., Volumen2

Sir David Brewster - 1813 - 427 páginas
...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

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 Elements of Physics

Thomas Webster - 1837 - 490 páginas
...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 ..., Volumen1

William Whewell - 1837 - 546 páginas
...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, Volumen66

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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A Rudimentary Treatise on the History, Construction, and Illumination of ...

Alan Stevenson - 1850 - 204 páginas
...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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Hand-books of Natural Philosophy and Astronomy: Mechanics. Hydrostatics ...

Dionysius Lardner - 1851
...each transparent medium has its own particular refracting power, but for the same transparent medium the ratio of the sines of the angles of incidence and refraction is always the same. 980. Index of refraction. — The number which thus expresses the ratio of the...
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Elementos de fisica esperimental dedicados á la enseñanza de los alumnos del ...

Abendaño - 1852 - 206 páginas
...again, and thus take ten or fifteen readings between B and D. Now from these readings to prove that the ratio of the sines of the angles of incidence and refraction is always constant and equal to the index of refraction. In the figure, the angle of incidence equals...
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