Elementary Treatise on Natural Philosophy, Volumen4D. Appleton, 1891 |
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Página 867
... effect con- tinues after the movements have become much too small to be visible . It thus appears that a vibratory movement , if sufficiently rapid , may produce a sound . The following experiments afford additional illustration of this ...
... effect con- tinues after the movements have become much too small to be visible . It thus appears that a vibratory movement , if sufficiently rapid , may produce a sound . The following experiments afford additional illustration of this ...
Página 872
... effect which is propagated , from a vibrating body , through an elastic and ponderable medium . — 869. Mode of Propagation of Sound . We will now endeavour to explain the action by which sound is propagated . Let there be a plate a ...
... effect which is propagated , from a vibrating body , through an elastic and ponderable medium . — 869. Mode of Propagation of Sound . We will now endeavour to explain the action by which sound is propagated . Let there be a plate a ...
Página 880
... effect of wind blowing either with or against the sound . The error from this cause is nearly eliminated by firing the guns alternately at the two stations , and still more completely by firing them simultaneously This last plan was ...
... effect of wind blowing either with or against the sound . The error from this cause is nearly eliminated by firing the guns alternately at the two stations , and still more completely by firing them simultaneously This last plan was ...
Página 882
... Effects of Pressure , Temperature , and Moisture . - The velocity of sound is independent of the height of the barometer ... effect is comparatively trifling , at least in temperate climates . At the tem- perature 50 ° F. , air saturated ...
... Effects of Pressure , Temperature , and Moisture . - The velocity of sound is independent of the height of the barometer ... effect is comparatively trifling , at least in temperate climates . At the tem- perature 50 ° F. , air saturated ...
Página 891
... effect no longer occurs . If the card is made to rotate rapidly in a continuous manner , the alterations of loudness will form a series of beats . It is for a similar reason that , when a large bell is vibrating , a person in its centre ...
... effect no longer occurs . If the card is made to rotate rapidly in a continuous manner , the alterations of loudness will form a series of beats . It is for a similar reason that , when a large bell is vibrating , a person in its centre ...
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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