 | Edwin James Houston - 1881 - Страниц: 220
...transparent or translucent. When light is reflected from a body, the direction of the light is changed. The angle of reflection is always equal to the angle of incidence. When light enters a transparent substance obliquely to the surface, it is refracted or bent out from... | |
 | Charles Harrison Vilas - 1882 - Страниц: 164
...incidence ABD is equal to the angle of reflection CB D. reflected obliquely; or as optically expressed, the angle of reflection is always equal to the angle of incidence. A concave mirror may be regarded as the interior surface of a portion or segment of a hollow sphere.... | |
 | Frederick Hungerford Bowman - 1882 - Страниц: 352
...Surfaces. — Curved surfaces reflect rays of light in the same way that plane surfaces do : viz., that the angle of reflection is always equal to the angle of incidence. The rays, however, after being reflected, are no longer parallel, but converge towards one point, which... | |
 | Charles Harrison Vilas - 1882 - Страниц: 164
...incidence ABD isequal to the angle of reflection CB D. reflected obliquely; or as optically expressed, the angle •of reflection is always equal to the angle of incidence. A concave mirror may be regarded as the interior surface of a portion or segment of a hollow sphere.... | |
 | John Ogilvie - 1883 - Страниц: 834
...thrown back or reflected, and thus forms what is called an echo, the law of the reflection being that the angle of reflection is always equal to the angle of incidence. Sounds are usually classified under the two heads of noute* and musical sound*. A musical sound is... | |
 | Augusta Jane Wilson - 1883 - Страниц: 394
...tablets, on which man writes whatever pleases him best. In sociology, as well as physics and dynamics — the angle of reflection is always equal to the angle of incidence — the psychologic rebound is ever in proportion to the mental pressure, one extreme invariably impinges... | |
 | Edwin James Houston - 1884 - Страниц: 224
...transparent or translucent. When light is reflected from a body, the direction of the light is changed. The angle of reflection is always equal to the angle of incidence. When light enters a transparent substance obliquely to the surface, it is refracted or bent out from... | |
 | Leonard Landois - 1885 - Страниц: 700
...weakened. Reflection of the sound-waves occurs when they impinge upon a solid obstacle, in which case the angle of reflection is always equal to the angle of incidence. Wave Movements.— We distinguish I. Progressive wave movements which occur in two forms— 1. As longitudinal... | |
 | Alfred Payson Gage - 1888 - Страниц: 380
...the mirror is reflected at an angle of 10° (called the angle of reflection) with the perpendicular. The angle of reflection is always equal to the angle of incidence. 274. Reflection from Plane Mirrors ; Virtual Images. — • MM (Fig. 257) represents , a plane mirror,... | |
 | Hiram Erastus Butler - 1889 - Страниц: 520
...angle, and in the opposite direction from that of its approach. The same is true of the air waves. The angle of reflection is always equal to the angle of incidence. It will be well for you to satisfy yourself of the truth of this statement. It is well known that a... | |
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... the angle of reflection is always equal to the angle of incidence, the image for any point can be seen only in the reflected ray prolonged. 
