Elementary Treatise on Natural Philosophy, Volumen4D. Appleton, 1891 |
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Página 870
... Hence the study of musical sounds must necessarily form the basis of acoustics . Every sound which is recognized as musical is characterized by what may be called smoothness , evenness , or regularity ; and the physical cause of this ...
... Hence the study of musical sounds must necessarily form the basis of acoustics . Every sound which is recognized as musical is characterized by what may be called smoothness , evenness , or regularity ; and the physical cause of this ...
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.
Página 878
... Hence sound is transmitted through tubes to great distances with but little loss of intensity , especially if the tubes are large.1 The same principle is illustrated by the ease with which a scratch 1 Regnault , in his experiments on ...
... Hence sound is transmitted through tubes to great distances with but little loss of intensity , especially if the tubes are large.1 The same principle is illustrated by the ease with which a scratch 1 Regnault , in his experiments on ...
Página 879
... hence there is a continual diminution of amplitude in the vibrations as the distance from the source increases . This involves a continual decrease of loudness . An undulation involves the onward transference of energy ; and the amount ...
... hence there is a continual diminution of amplitude in the vibrations as the distance from the source increases . This involves a continual decrease of loudness . An undulation involves the onward transference of energy ; and the amount ...
Página 881
... Hence we must infer that the compressions and extensions which the particles of air undergo in transmitting sound are of too brief duration to allow of any sensible transference of heat from particle to particle . This conclusion is ...
... Hence we must infer that the compressions and extensions which the particles of air undergo in transmitting sound are of too brief duration to allow of any sensible transference of heat from particle to particle . This conclusion is ...
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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