Elementary Treatise on Natural Philosophy, Volumen4D. Appleton, 1891 |
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Página 868
... 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 is also mani- fested by another ...
... 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 is also mani- fested by another ...
Página 872
... fact , seeing that fishes are provided with audi- tory apparatus , and have often an acute sense of hearing . As to solids , some well - known facts prove that they transmit sound very perfectly . For example , light taps with the head ...
... fact , seeing that fishes are provided with audi- tory apparatus , and have often an acute sense of hearing . As to solids , some well - known facts prove that they transmit sound very perfectly . For example , light taps with the head ...
Página 882
... be greater than about 1 part in 440 , which will be between 2 and 3 feet per second . The increase should , in fact , be somewhat VELOCITY IN GASES AND LIQUIDS . 883 less than this 882 PRODUCTION AND PROPAGATION OF SOUND .
... be greater than about 1 part in 440 , which will be between 2 and 3 feet per second . The increase should , in fact , be somewhat VELOCITY IN GASES AND LIQUIDS . 883 less than this 882 PRODUCTION AND PROPAGATION OF SOUND .
Página 883
... fact , is the form in which Newton states his result.2 Newton himself was quite aware that the value thus computed theoretically was too small , and he throws out a conjecture as to the cause of the discrepancy ; but the true cause was ...
... fact , is the form in which Newton states his result.2 Newton himself was quite aware that the value thus computed theoretically was too small , and he throws out a conjecture as to the cause of the discrepancy ; but the true cause was ...
Página 891
... fact the images ( with reference to the obstacle regarded as a plane mirror ) of the waves which would exist in the prolongation of the tube if the obstacle were withdrawn . At the distance of half a wave - length from the obstacle the ...
... fact the images ( with reference to the obstacle regarded as a plane mirror ) of the waves which would exist in the prolongation of the tube if the obstacle were withdrawn . At the distance of half a wave - length from the obstacle the ...
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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