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" The disciples of Plato contributed not a little to the advancement of optics, by the important discovery they made, that light emits itself in straight lines, and that the angle of incidence is always equal to the angle of reflection. Plato terms colours... "
Cassell's Book of Sports and Pastimes - Seite 465
1882 - 975 Seiten
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A Dissertation on the Philosophy of Aristotle: In Four Books ...

Thomas Taylor - 1812 - 628 Seiten
...and at noon are direct ; but in winter and the morning they are oblique. But it is demonstrated that the angle of incidence is always equal to the angle of reflection. Reflections however at right angles, more compress the air, and on this account the air is more heated...
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A Philosophical and Mathematical Dictionary: Containing an ..., Band 2

Charles Hutton - 1815 - 686 Seiten
...вг. General Laws of REFLECTION. — 1. When a ray of light is reflected from a speculum of any form, the angle of incidence is always equal to the angle of reflection. This law obtains in the percussions of all kinds of bodies ; and consequently must do so in those of...
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Encyclopaedia Perthensis; Or Universal Dictionary of the Arts ..., Band 5

1816 - 844 Seiten
...oppofite furftcf. When a perpendicular is drawn to the reflecting furface, at the point of incidence, the angle of incidence is always equal -to the angle of reflection, It has been demonftrated that reflected rays do mt come in contact with the reflecting furface; but...
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The Inverted Scheme of Copernicus: With the Pretended Experiments Upon which ...

Bartholomew Prescot - 1822 - 292 Seiten
...of optics, by the important discovery they made, that light emits itself in straight lines, and that the angle of incidence is always equal to the angle of reflection. Plato also seems to have apprehended the Newtonian system of colours, for he calls them the effect...
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The Table Book..., Band 1

William Hone - 1827 - 892 Seiten
...of optics, by the important discovery they made, that light emits itself in straight lines, and that the angle of incidence is always equal to the angle of reflection. Plato terms colours " the effect of light transmitted from bodies, the small particles of which were...
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Elements of Chemistry, Band 1

Andrew Fyfe - 1827 - 1076 Seiten
...it strikes the plate, is called the angle of Incidence ,• EDA, is the angle of reflection ; hence the angle of incidence is always equal to the angle of reflection. If the plate be not flat, the reflected rays are either dispersed or concentrated. Thus, if they strike...
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Elements of Physics: Or, Natural Philosophy, General and Medical ..., Band 1

Neil Arnott - 1827 - 692 Seiten
...equal degree of obliquity on the other side. To express this very important law shortly, we say that " the angle of incidence is always equal to the angle of reflection." — According to this law, any irregular surface must break an echo ; and if the irregularity be very...
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The Table Book, Band 2

William Hone - 1828 - 468 Seiten
...of optics, by the important discovery they made, that light emits itself in straight lines, and that the angle of incidence is always equal to the angle of reflection. Plato terms colours " the effect of light transmitted from bodies, the small particles of which were...
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A Family Encyclopaedia: Or, An Explanation of Words and Things Connected ...

George Crabb - 1831 - 426 Seiten
...mirror. REFLECTION, ANGLE OF. the law ol reflection is generally expressed by the assertidn, that " the angle of incidence is always equal to the angle of reflection," and is thus explained: If in the accompanying figure AB be a plane surface, and a ball at D be impelled...
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An Easy Grammar of Natural and Experimental Philosophy, for the Use of Schools

Sir Richard Phillips - 1832 - 286 Seiten
...heat that fall upon them. Polished surfaces, espe* cially of metallic substances, reflect them. best. The angle of incidence is always equal to the angle of reflection. Observation. Hence, by means of concave reflectors, heat may be converged to a focus like light. Glass...
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