Elementary Treatise on Natural Philosophy, Volumen4D. Appleton, 1891 |
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Página 866
... usually so close that the period may practically be regarded as altogether independent of the amplitude . When the spring is long , the extent of its movements may gene- rally be perceived by the eye . In consequence of the persistence ...
... usually so close that the period may practically be regarded as altogether independent of the amplitude . When the spring is long , the extent of its movements may gene- rally be perceived by the eye . In consequence of the persistence ...
Página 870
... usually performed with a special instru- ment invented by Trevelyan , and 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 ...
... usually performed with a special instru- ment invented by Trevelyan , and 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 ...
Página 876
... usually produces condensation on one side , at the same instant that it produces rare- faction on another . This is the case , for example , with a vibrating PROPAGATION IN AN OPEN SPACE . 877 plate , since 876 PRODUCTION AND ...
... usually produces condensation on one side , at the same instant that it produces rare- faction on another . This is the case , for example , with a vibrating PROPAGATION IN AN OPEN SPACE . 877 plate , since 876 PRODUCTION AND ...
Página 889
... usually given of its action is , that the slightly conical form of the long tube produces a series of reflections in directions more and more nearly parallel to the axis ; but this explana- tion fails to account for the utility of the ...
... usually given of its action is , that the slightly conical form of the long tube produces a series of reflections in directions more and more nearly parallel to the axis ; but this explana- tion fails to account for the utility of the ...
Página 898
... the gamut both upwards and downwards , which may be continued over as many octaves as we please . The notes of the gamut are usually called by the names GAMUT AND MUSICAL INTERVALS . 899 Do Re Mi Fa 898 NUMERICAL EVALUATION OF SOUND .
... the gamut both upwards and downwards , which may be continued over as many octaves as we please . The notes of the gamut are usually called by the names GAMUT AND MUSICAL INTERVALS . 899 Do Re Mi Fa 898 NUMERICAL EVALUATION OF SOUND .
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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