Elementary Treatise on Natural Philosophy, Volumen4D. Appleton, 1891 |
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Página 861
... glasses , 1068. Colours of mixed powders , 1069. Mixture of coloured lights . Different compositions may produce the same visual impression , 1970. Methods of mixture : glass plate ; rotating disc ; overlapping spectra . A.
... glasses , 1068. Colours of mixed powders , 1069. Mixture of coloured lights . Different compositions may produce the same visual impression , 1970. Methods of mixture : glass plate ; rotating disc ; overlapping spectra . A.
Página 862
Augustin Privat-Deschanel Joseph David Everett. glass plate ; rotating disc ; overlapping spectra . A mixture may be either a mean or a sum . Colour equations , 1071. Helmholtz's crossed slits , and Maxwell's colour- box , 1072. Results ...
Augustin Privat-Deschanel Joseph David Everett. glass plate ; rotating disc ; overlapping spectra . A mixture may be either a mean or a sum . Colour equations , 1071. Helmholtz's crossed slits , and Maxwell's colour- box , 1072. Results ...
Página 867
... glass bell ( Fig . 593 ) . If a rosined fiddle - bow is then drawn over the edge of the bell , until a musical note is emitted , a series of taps are heard , due to the striking of the bell against the point . A pith - ball , hung by a ...
... glass bell ( Fig . 593 ) . If a rosined fiddle - bow is then drawn over the edge of the bell , until a musical note is emitted , a series of taps are heard , due to the striking of the bell against the point . A pith - ball , hung by a ...
Página 868
... glass , and let a small membrane m , stretched over a frame , be strewed with sand , and lowered into the pipe . The sand will be thrown into violent agitation , and the rattling of the grains , as they fall back on the membrane , is ...
... glass , and let a small membrane m , stretched over a frame , be strewed with sand , and lowered into the pipe . The sand will be thrown into violent agitation , and the rattling of the grains , as they fall back on the membrane , is ...
Página 871
... Hence it may fairly be con- cluded that if the receiver could be perfectly exhausted , and a per- fectly inelastic support could be found for the bell , no sound at all would be emitted . 2. The experiment may be varied by using a glass.
... Hence it may fairly be con- cluded that if the receiver could be perfectly exhausted , and a per- fectly inelastic support could be found for the bell , no sound at all would be emitted . 2. The experiment may be varied by using a glass.
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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