Hand-books of Natural Philosophy and Astronomy: OpticsC. Lockwood & Company, 1878 - Physics |
From inside the book
Results 1-5 of 34
Page xi
... radii · · 158. Image formed by double convex lens · 159. Conditions which determine the magnitude of the image · - ib . ib . 106 - 108 160. Experimental illustrations - 161. Images formed by concave lenses 110 162. A radiant placed in ...
... radii · · 158. Image formed by double convex lens · 159. Conditions which determine the magnitude of the image · - ib . ib . 106 - 108 160. Experimental illustrations - 161. Images formed by concave lenses 110 162. A radiant placed in ...
Page 6
... radii , the arch being 90 ° , and the radii , conse- quently , at right angles to each other . The in- strument was adjusted by means of a plumb - line , so that one radius was vertical and the other horizontal . It was sup- ported on a ...
... radii , the arch being 90 ° , and the radii , conse- quently , at right angles to each other . The in- strument was adjusted by means of a plumb - line , so that one radius was vertical and the other horizontal . It was sup- ported on a ...
Page 11
... radii , the surface of the greater sphere will be four times that of the lesser . Now since all the light issuing from the luminous point is diffused over the surface of each sphere , it is clear that its density on the sur- face of the ...
... radii , the surface of the greater sphere will be four times that of the lesser . Now since all the light issuing from the luminous point is diffused over the surface of each sphere , it is clear that its density on the sur- face of the ...
Page 37
... drawn to the edge of the reflector is half the opening . The right line в o x , drawn through the vertex and the centre of the reflector , is called the axis of the reflector . Since all radii of a circle are at right angles REFLECTION .
... drawn to the edge of the reflector is half the opening . The right line в o x , drawn through the vertex and the centre of the reflector , is called the axis of the reflector . Since all radii of a circle are at right angles REFLECTION .
Page 38
... radii of a spherical surface are at right angles to such surface . Hence it follows that all radii of a spherical reflector , such as O R , O R ' , OR " , & c . , are respectively at right angles to the surface of the reflector . These ...
... radii of a spherical surface are at right angles to such surface . Hence it follows that all radii of a spherical reflector , such as O R , O R ' , OR " , & c . , are respectively at right angles to the surface of the reflector . These ...
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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.