Elementary Treatise on Natural Philosophy, Volumen4D. Appleton, 1891 |
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Página 865
... called vibratory . The motion from D ' to D " , or from D " to D ' , is called a single vibration . The two together constitute a double or complete vibration ; and the time of executing 55.
... called vibratory . The motion from D ' to D " , or from D " to D ' , is called a single vibration . The two together constitute a double or complete vibration ; and the time of executing 55.
Página 868
... called nodal lines . These are , in fact , the lines which separate portions of the plate whose movements are in oppo- site directions . Their position changes whenever the plate changes its note . The vibratory condition of the plate ...
... called nodal lines . These are , in fact , the lines which separate portions of the plate whose movements are in oppo- site directions . Their position changes whenever the plate changes its note . The vibratory condition of the plate ...
Página 870
... called a rocker , which , after being heated and laid upon a block of lead , rocks rapidly from side to side , and yields a loud note . 867. Distinctive Character of Musical Sound . - It is not easy to draw a sharp line of demarcation ...
... called a rocker , which , after being heated and laid upon a block of lead , rocks rapidly from side to side , and yields a loud note . 867. Distinctive Character of Musical Sound . - It is not easy to draw a sharp line of demarcation ...
Página 871
... called the period of the movements . Practically , musical and unmusical sounds often shade insensibly into one another . The tones of every musical instrument are accom- panied by more or less of unmusical noise . The sounds of bells ...
... called the period of the movements . Practically , musical and unmusical sounds often shade insensibly into one another . The tones of every musical instrument are accom- panied by more or less of unmusical noise . The sounds of bells ...
Página 876
... called longitudinal ; and it is by such vibrations that sound is pro- pagated through air . Fig . 605 illustrates the manner in which an undulation may be propagated by means of transverse vibrations , that is to say , by vibrations ...
... called longitudinal ; and it is by such vibrations that sound is pro- pagated through air . Fig . 605 illustrates the manner in which an undulation may be propagated by means of transverse vibrations , that is to say , by vibrations ...
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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