Hand-books of Natural Philosophy and Astronomy: OpticsC. Lockwood & Company, 1878 - Physics |
From inside the book
Results 1-5 of 46
Page 19
... circular aperture in producing the image of a distant object is shown in fig . 18 . I Fig . 19 . We have here supposed the shape of the aperture c to be circu- lar , but the shape does not affect the production of the image , as may be ...
... circular aperture in producing the image of a distant object is shown in fig . 18 . I Fig . 19 . We have here supposed the shape of the aperture c to be circu- lar , but the shape does not affect the production of the image , as may be ...
Page 21
... circular opaque disc , somewhat less in diameter than the tube , so that in looking through the tube a transparent ring will be visible , as represented in fig . 20. In the centre of this ring will appear an intensely dark circular ...
... circular opaque disc , somewhat less in diameter than the tube , so that in looking through the tube a transparent ring will be visible , as represented in fig . 20. In the centre of this ring will appear an intensely dark circular ...
Page 33
... м N be placed between r ' and s , at right angles to the line F's . The reflected light will appear upon this screen when held near to s as an illuminated disc with a D small circular dark spot in its centre , this dark REFLECTION . 33.
... м N be placed between r ' and s , at right angles to the line F's . The reflected light will appear upon this screen when held near to s as an illuminated disc with a D small circular dark spot in its centre , this dark REFLECTION . 33.
Page 34
... circular spot in its centre , and this diminution will con- tinue until the screen arrives at the point r ' , when the illuminated disc will be reduced to a small light spot , and the dark spot in its centre will disappear . • This ...
... circular spot in its centre , and this diminution will con- tinue until the screen arrives at the point r ' , when the illuminated disc will be reduced to a small light spot , and the dark spot in its centre will disappear . • This ...
Page 35
... circular screen be held between s and в at right angles to the axis , it will be found that the rays reflected from the elliptic surface will be inclosed between two conical surfaces , one of which is bounded by F R ' and Fr ' , and the ...
... circular screen be held between s and в at right angles to the axis , it will be found that the rays reflected from the elliptic surface will be inclosed between two conical surfaces , one of which is bounded by F R ' and Fr ' , and the ...
Contents
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Other editions - View all
Hand-Books of Natural Philosophy and Astronomy: Heat Dionysius Lardner,George Carey Foster No preview available - 2016 |
Common terms and phrases
already explained angle of incidence angle of refraction apparent magnitude appear axes centre chromatic circular colour concave reflector consequently convex lens corresponding crystal curved diameter diminished direction disc distance distinct vision diverging double convex double refraction effect equal extreme eye glass eye piece focal length foci focus F focus of incident greater illuminated inch incident rays index of refraction instrument intensity lenses less luminous point magnifying power manner medium microscope motion moved object glass object piece observer opaque optic axis parallel rays pencil of rays perception perpendicular phenomena placed plane of polarisation plano-convex lens plate position principal focus prism produced proportion radii radius reflected rays reflecting surface refracting power refrangibility rendered represented in fig retina right angles screen secondary pencil seen side sine space spectrum spherical aberration spherical reflector supposed telescope tion tourmaline transmitted transparent tube vertex vertical violet visual magnitude yellow
Popular passages
Page 197 - When a ray of light passes from one medium to another, it is refracted so that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is equal to the ratio of the velocities in the two media.
Page 433 - In ordering from this List it is recommended, as a means of facilitating business and obviating error, to quote the numbers affixed to the volumes, as well as the titles and prices. CIVIL ENGINEERING, SURVEYING, ETC. 31.• WELLS AND WELL-SINKING.
Page viii - The perspicuity of the original has been retained, and chapters which had become obsolete, have been replaced by others of more modern character. The explanations throughout are studiously popular, and care has been taken to show the application of the various branches of physics to the industrial arts, and to the practical business of life.