Elementary Treatise on Natural Philosophy, Volumen4D. Appleton, 1891 |
Dentro del libro
Resultados 1-5 de 29
Página 865
... turning is sufficient to carry it to a nearly Fig . 592. - Vibration of Straight Spring . equal distance on the other side ; and it thus swings alternately from one side to the other through distances very gradually diminishing , until ...
... turning is sufficient to carry it to a nearly Fig . 592. - Vibration of Straight Spring . equal distance on the other side ; and it thus swings alternately from one side to the other through distances very gradually diminishing , until ...
Página 891
... turned through the width of half a sector , the 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 ...
... turned through the width of half a sector , the 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 ...
Página 904
... cylinder , which can be turned by a handle , a screw cut on the axis VIBROSCOPE AND PHONAUTOGRAPH . 905 causing it at the same. Fig . 616. - Vibroscope . Fig . 617. - Traces by Phonautograph . Fig . 904 NUMERICAL EVALUATION OF SOUND .
... cylinder , which can be turned by a handle , a screw cut on the axis VIBROSCOPE AND PHONAUTOGRAPH . 905 causing it at the same. Fig . 616. - Vibroscope . Fig . 617. - Traces by Phonautograph . Fig . 904 NUMERICAL EVALUATION OF SOUND .
Página 905
... turned . The result is a wavy line traced on the blackened surface , and the number of wave - forms ( each including a pair of bends in opposite directions ) is the number of vibrations . If the experiment lasts for a measured interval ...
... turned . The result is a wavy line traced on the blackened surface , and the number of wave - forms ( each including a pair of bends in opposite directions ) is the number of vibrations . If the experiment lasts for a measured interval ...
Página 920
... turned on , by means of the cock below the mouth - piece . The first note heard will be feeble and deep ; it is the fundamental note of the pipe . As the wind is gradually turned full on , and in- creasing pressure afterwards applied to ...
... turned on , by means of the cock below the mouth - piece . The first note heard will be feeble and deep ; it is the fundamental note of the pipe . As the wind is gradually turned full on , and in- creasing pressure afterwards applied to ...
Otras ediciones - Ver todas
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