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" But these equal angles are the complements of the angles of incidence and reflexion, which are also equal. Wherefore rays, parallel to the axis, will be reflected into the lines which all meet at one and the same focus. "
An Introduction to Natural Philosophy: Designed as a Text Book, for the Use ... - Page 215
by Denison Olmsted - 1832
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The Philosophical Works of Francis Bacon, Baron of Verulam, Viscount St ...

Francis Bacon, Peter Shaw - 1733 - 658 pages
...Calcination; in Mufic, that Concords intermixed with Difcords, make Harmony, £gV. » • Such as in- Optics, that the Angle of Incidence is equal to the Angle of Reflexion, in all, "Sorts of Surfaces ; in Pbyfics, Sir Ij'aac. Ne felon's three Laws of Motion, &c. moft general;...
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Philosophia Britannica: Or, A New & Comprehensive System of the Newtonian ...

Benjamin Martin - 1747 - 574 pages
...and forming the Images of Objects : And this all depends (in Refleffion of Light) on that fundamental Law, That the Angle of Incidence is equal to the Angle of Reflexion. LET EH be a concave Mirrour, V its Vertex, pj* j/ and C the Center of its Concavity. Let A be a Ray...
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A Course of Mathematics in Two Volumes for the Use of Academies as Well as ...

Charles Hutton - 1807 - 464 pages
...FE is parallel to fe, the /. e = /. FET ; therefore the ^.FKT = Z-fEe. QED Carol. As opticians find that the angle of incidence is equal to the angle of reflexion, it appears, from this proposition, that rays of light issuing from the one focus, and meeting the curve...
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A Plain Elementary and Practical System of Natural Experimental Philosophy ...

John Ewing - 1809 - 672 pages
...doctrine of reflexion depends upon this fundamental principle, which we have already demonstrated, viz. That the angle of incidence is equal to the angle of reflexion; and when any point of an object is seen by reflected light, it is always seen in the direction of the...
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A Course of Mathematics: In Three Volumes : Composed for the Use of the ...

Charles Hutton - 1811 - 494 pages
...FE is parallel to fe, the / e = / FET ; therefore the / FET = L fae. QE i?. Corol. As opticians find that the angle of incidence is equal to the angle of reflexion, it appears, from this proposition, that rays of light issuing from the one focus, and meeting the curve...
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Systematic Education: Or Elementary Instruction in the Various ..., Volume 2

William Shepherd, Jeremiah Joyce, Lant Carpenter - 1815 - 598 pages
...HB, and the reflected ray BA, viz. HBA. When a ray of light falls upon any body, it is reflected, so that the angle of incidence is equal to the angle of reflexion ; this is the fundamental fact upon which all the properties of all kinds of mirrors depend. If for...
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Pneumatics, electricity, magnetism, and optics

Denison Olmsted - 1835 - 374 pages
...parallel to the axis will be reflected into the lines which all meet at one and the same focus. 886. DIVERGING RAYS incident upon a concave mirror are...angle of reflexion made with the radius of concavity. \ If the radiant point be farther from the mirror than the center, as at A, then the focus will be...
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An Introduction to Natural Philosophy: Designed as a Text Book, for the Use ...

Denison Olmsted - 1844 - 618 pages
...parallel to the axis, will be reflected into the lines which all meet at one and the same focus. 725. DIVERGING RAYS, incident upon a concave mirror, are...mirror is changed, conformably to the law, that the angl% of incidence is equal to the angle of reflexion made with the radius of concavity.^ If the radiant...
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Introduction to the study of natural philosophy

Charles Tomlinson - 1848 - 176 pages
...same angle with the ledge, as did the ball's original path A B. This is commonly expressed by saying that the angle of incidence is equal to the angle of reflexion ; the former meaning the angle ABtZ, and the latter d~&e; and though this law is only approximately...
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An Introduction to Natural Philosophy: Designed as a Text Book for the Use ...

Denison Olmsted - 1850 - 624 pages
...parallel to the axis, will be reflected into the lines which all meet at one and the same focus. 725. DIVERGING RAYS, incident upon a concave mirror, are...to the law, that the angle of incidence is equal to tlie angle of rejlexion made with the radius of concavity.-^ If the radiant point be further from the...
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