 | Charles Hutton - Astronomy - 1815 - 686 pages
...from the sun falling on a mirror, in a dark room, through a small hole, will be seen to rebound, so as to make the angle of reflection equal to the angle of incidence. And the same may E be shown in various other ways : thus ex. gr. placing a semicircle DFE on a mirror... | |
 | John Farrar - Dynamics - 1825 - 476 pages
...an inflexible and unelastic plane, (friction being out of the question) takes place in such a manner as to make the angle of reflection equal to the angle of incidence, these angles having for their measure the inclination to a horizontal plane of the tangents at the... | |
 | Richard Green Parker - Astronomy - 1839 - 262 pages
...namely, that when light falls on any reflecting surface, it will invariably be reflected in such a manner as to make the angle of reflection equal to the angle of incidence. t Mirrors for looking-glasses) may be made of polished metal, or glass, with the back covered with... | |
 | Gaspard Monge (comte de Péluse.), John Fry Heather - 1851 - 152 pages
...this state. It is known that the rays of light which fall upon a polished surface are reflected so as to make the angle of reflection equal to the angle of incidence. If the light emanates from a single point, each point of the polished surface receives and reflects... | |
 | John Fry Heather - Geometry, Descriptive - 1851 - 156 pages
...this state. It is known that the rays of light which fall upon a polished surface are reflected so as to make the angle of reflection equal to the angle of incidence. If the light emanates from a single point, each point of the polished surface receives and reflects... | |
 | George Payn Quackenbos - Physics - 1860 - 484 pages
...produce the sound, but are neutralized by those of the second. 732. REFLECTION OF SOUND. — Vibrations striking a plane surface are reflected from it (like light and heat) in such a way as to make the angle of reflection equal to the angle of incidence. 733. Echoes. — When a sound is heard a second... | |
 | George Payn Quackenbos - Physics - 1860 - 468 pages
...is the angle of reflection. From every surface, whatever its form, the incident ray is thrown off in such a way as to make the angle of reflection equal to the angle of incidence. 610. From these Figures it is obvious that an object which would not otherwise be visible can be seen... | |
 | George Payn Quackenbos - Physics - 1863 - 474 pages
...produce the sound, but are neutralized by those of the second. 732. REFLECTION OF SOUND. — Vibrations striking a plane surface are reflected from it (like light and heat) in such a way as to make the angle of reflection equal to the angle of incidence. 733. Echoes. — When a sound is heard a second... | |
 | 1873 - 126 pages
...along the major axis. [A perfectly elastic ball, in impinging upon any surface, would be reflected so as to make the angle of reflection equal to the angle of incidence. If therefore the ball, wherever placed, bo struck through one focus of the smooth elliptical billiard... | |
 | George Ripley, Charles Anderson Dana - Encyclopedias and dictionaries - 1875 - 900 pages
...ball. If a perfectly elastic ball is thrown obliquely against a smooth plane, it will be reflected so as to make the angle of reflection equal to the angle of incidence. If '!it liall is imperfectly elastic, the angle of reflection will be greater than the angle of incidence... | |
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Vibrations striking a plane surface are reflected from it (like light and heat) in such a way as to make the angle of reflection equal to the angle of incidence. 733. Echoes. — When a sound is heard a second time by reflection, after a certain interval,... 
