Elementary Treatise on Natural Philosophy, Volumen4D. Appleton, 1891 |
Dentro del libro
Resultados 1-5 de 78
Página 862
... Rays in air are concave towards the denser side , 1084. Calculation of curvature of horizontal or nearly horizontal rays , 1085. Of inclined rays , 1086. Astronomical refraction , 1088 . Mirage , 1089. Curved rays of sound , 1090 ...
... Rays in air are concave towards the denser side , 1084. Calculation of curvature of horizontal or nearly horizontal rays , 1085. Of inclined rays , 1086. Astronomical refraction , 1088 . Mirage , 1089. Curved rays of sound , 1090 ...
Página 886
... ray of sound . OI is a direct ray , and I M the corresponding reflected ray ; and it is obvious , from the symmetrical position of the points O O ' , that these two rays are equally in- clined to the surface , or the angles of incidence ...
... ray of sound . OI is a direct ray , and I M the corresponding reflected ray ; and it is obvious , from the symmetrical position of the points O O ' , that these two rays are equally in- clined to the surface , or the angles of incidence ...
Página 951
... rays thus admitted is easily traced by the lighting up of the particles of dust which lie in its course . The image of the sun which is formed at its further ex- tremity will be either circular or elliptical , according as the incidence ...
... rays thus admitted is easily traced by the lighting up of the particles of dust which lie in its course . The image of the sun which is formed at its further ex- tremity will be either circular or elliptical , according as the incidence ...
Página 952
... rays shine through the foliage of a tree ( Fig . 646 ) , the spots of light which they form upon the ground are always round or oval , whatever may be the shape of the interstices through which they have passed , provided always that ...
... rays shine through the foliage of a tree ( Fig . 646 ) , the spots of light which they form upon the ground are always round or oval , whatever may be the shape of the interstices through which they have passed , provided always that ...
Página 967
... rays AB ( Fig . 659 ) be admitted through a small hole in the shutter of a dark room , and allowed to fall on a ... ray and the normal is called the angle of incidence ; and the angle CBD contained between the corresponding reflected ray ...
... rays AB ( Fig . 659 ) be admitted through a small hole in the shutter of a dark room , and allowed to fall on a ... ray and the normal is called the angle of incidence ; and the angle CBD contained between the corresponding reflected ray ...
Otras ediciones - Ver todas
Términos y frases comunes
achromatic analyser angle of incidence beam body bright lines called centimetres centre coincidence colours concave mirror conjugate foci convex convex lens crystal curvature denote diameter direction distance employed equal experiment eye-piece flame focal length frequency of vibration fundamental note glass harmonics Hence Iceland-spar incident ray index of refraction interval inverted law of sines lens lenses luminous point magnifying power medium metres minimum deviation nearly node normal number of vibrations object object-glass oblique observer obtained octave optical ordinary parallel particles pencil perpendicular pipe pitch placed plane mirror plate polarization portion position principal axis principal focus prism produced propagation radius rarefaction ratio reflected rays refrangibility represented retina rotation screen seen side slit solar spectra spectrum spherical string subtends surface telescope tion tone traversing tube undulation velocity of sound vertical vibrations vibrations per second violet virtual image visual angle wave-front wave-length waves