Elementary Treatise on Natural Philosophy, Volumen4D. Appleton, 1891 |
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Página 861
... bodies , 1067. Of transparent bodies . Superposition of coloured glasses , 1068. Colours of mixed powders , 1069. Mixture of coloured lights . Different compositions may produce the same visual impression , 1970. Methods of mixture ...
... bodies , 1067. Of transparent bodies . Superposition of coloured glasses , 1068. Colours of mixed powders , 1069. Mixture of coloured lights . Different compositions may produce the same visual impression , 1970. Methods of mixture ...
Página 868
... body may sometimes be air , as in the case of organ- pipes , which we shall describe in a later chap- ter . It is easy to show by experiment that when a pipe speaks , the air within it is vibrat- ing . Let one side of the tube be of ...
... body may sometimes be air , as in the case of organ- pipes , which we shall describe in a later chap- ter . It is easy to show by experiment that when a pipe speaks , the air within it is vibrat- ing . Let one side of the tube be of ...
Página 871
... body ; but these vibratory movements cannot bring about the sensation of hearing unless there be a medium to transmit them to the auditory apparatus . This medium may be either solid , liquid , or gaseous , but it is necessary that it ...
... body ; but these vibratory movements cannot bring about the sensation of hearing unless there be a medium to transmit them to the auditory apparatus . This medium may be either solid , liquid , or gaseous , but it is necessary that it ...
Página 872
... bodies of enemies . We are entitled then to assert that sound , as it affects our organs of hearing , is an effect which is propagated , from a vibrating body , through an elastic and ponderable medium . — 869. Mode of Propagation of ...
... bodies of enemies . We are entitled then to assert that sound , as it affects our organs of hearing , is an effect which is propagated , from a vibrating body , through an elastic and ponderable medium . — 869. Mode of Propagation of ...
Página 876
... body of air , the undulations to which it gives rise run out in all directions from the source . If the disturbance is symmetrical about a centre , the waves will be spheri- cal ; but this case is exceptional . A disturbance usually ...
... body of air , the undulations to which it gives rise run out in all directions from the source . If the disturbance is symmetrical about a centre , the waves will be spheri- cal ; but this case is exceptional . A disturbance usually ...
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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