Elementary Treatise on Natural Philosophy, Volumen4D. Appleton, 1891 |
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Página 867
... appears that a vibratory movement , if sufficiently rapid , may produce a sound . The following experiments afford additional illustration of this principle , and are samples of the evidence from which it is inferred that vibratory ...
... appears that a vibratory movement , if sufficiently rapid , may produce a sound . The following experiments afford additional illustration of this principle , and are samples of the evidence from which it is inferred that vibratory ...
Página 881
... appears that the velocity of sound in air cannot be less than D nor greater than 1:41 . Its actual velocity , as determined by observation , is identical , or practically identical , with the latter of these limiting values . Hence we ...
... appears that the velocity of sound in air cannot be less than D nor greater than 1:41 . Its actual velocity , as determined by observation , is identical , or practically identical , with the latter of these limiting values . Hence we ...
Página 883
... appears to be only 1:31 for aqueous vapour.1 877. Newton's Theory , and Laplace's Modification . The earliest theoretical investigation of the velocity of sound was that given by Newton in the Principia ( book 2 , section 8 ) . It ...
... appears to be only 1:31 for aqueous vapour.1 877. Newton's Theory , and Laplace's Modification . The earliest theoretical investigation of the velocity of sound was that given by Newton in the Principia ( book 2 , section 8 ) . It ...
Página 886
... appears to the hearer to proceed is determined by the direction along which the sonorous pulses are propagated , and is always normal to the waves . A normal to a set of sound - waves may therefore conveniently be called a ray of sound ...
... appears to the hearer to proceed is determined by the direction along which the sonorous pulses are propagated , and is always normal to the waves . A normal to a set of sound - waves may therefore conveniently be called a ray of sound ...
Página 889
... appears from a theoretical investigation by Lord Rayleigh that the speaking - trumpet causes a greater total quan- tity of sonorous energy to be produced from the same expenditure of breath.1 Ear - trumpets have various forms , as ...
... appears from a theoretical investigation by Lord Rayleigh that the speaking - trumpet causes a greater total quan- tity of sonorous energy to be produced from the same expenditure of breath.1 Ear - trumpets have various forms , as ...
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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