| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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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