Elementary Treatise on Natural Philosophy, Volumen4D. Appleton, 1891 |
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Página 860
... surface when incidence is normal , 989. Caustic . Position of image for oblique incidence , 990. Refraction through plate , 991. Multiple images , 992. Superposed plates ; Astronomical refraction , 993. Refraction through prism , 994 ...
... surface when incidence is normal , 989. Caustic . Position of image for oblique incidence , 990. Refraction through plate , 991. Multiple images , 992. Superposed plates ; Astronomical refraction , 993. Refraction through prism , 994 ...
Página 861
... surface , 1015. Refraction through a sphere , 1016 . Camera obscura , 1017. Photographic camera and photography ... Surfaces are equally bright at all distances . Image formed by theoretically perfect lens has same intrinsic brightness ...
... surface , 1015. Refraction through a sphere , 1016 . Camera obscura , 1017. Photographic camera and photography ... Surfaces are equally bright at all distances . Image formed by theoretically perfect lens has same intrinsic brightness ...
Página 862
... surfaces in non - isotropic Principle of Huygens . Wave - front , 1079 . Spherical wave - surface in isotropic medium . medium , 1080. Construction for wave - front in refraction . Law of sines , 1081 . Reflection , 1082. Newtonian ...
... surfaces in non - isotropic Principle of Huygens . Wave - front , 1079 . Spherical wave - surface in isotropic medium . medium , 1080. Construction for wave - front in refraction . Law of sines , 1081 . Reflection , 1082. Newtonian ...
Página 867
... Sand is strewn over the surface of a hori- zontal plate ( Fig . 594 ) , which is then made to vibrate by drawing a bow over its edge . As soon as the plate. Fig . 594. - Vibration of Plate . Fig . 596. - Vibration of Air . Fig .
... Sand is strewn over the surface of a hori- zontal plate ( Fig . 594 ) , which is then made to vibrate by drawing a bow over its edge . As soon as the plate. Fig . 594. - Vibration of Plate . Fig . 596. - Vibration of Air . Fig .
Página 872
... surface of the body , implies the transmission of sound through the walls of the chest . By applying the ear to the ground , remote sounds can often be much more distinctly heard ; and it is stated that savages can in this way obtain ...
... surface of the body , implies the transmission of sound through the walls of the chest . By applying the ear to the ground , remote sounds can often be much more distinctly heard ; and it is stated that savages can in this way obtain ...
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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