Elementary Treatise on Natural Philosophy, Volumen4D. Appleton, 1891 |
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Página 876
... gives rise run out in all directions from the source . If the disturbance is symmetrical about a centre , the waves will be spheri- cal ; but this case is exceptional . A disturbance usually produces condensation on one side , at the ...
... gives rise run out in all directions from the source . If the disturbance is symmetrical about a centre , the waves will be spheri- cal ; but this case is exceptional . A disturbance usually produces condensation on one side , at the ...
Página 893
... gives ( v - u ) dp - pdu = 0 , whence or , since u may be neglected in comparison with v , = δυ v - u δρ P δυ v δρ δη The time which the moving section occupies in traversing the lamina is and in this v time the velocity of the lamina ...
... gives ( v - u ) dp - pdu = 0 , whence or , since u may be neglected in comparison with v , = δυ v - u δρ P δυ v δρ δη The time which the moving section occupies in traversing the lamina is and in this v time the velocity of the lamina ...
Página 900
... gives the number of complete vibrations per second for each note of the middle octave of an ordinary piano : - C D E Tempered Gamut . Natural Gamut . Tempered Gamut . Natural Gamut . • • 258.7 258.7 G 387.6 388.0 • • · 290.3 291.0 A ...
... gives the number of complete vibrations per second for each note of the middle octave of an ordinary piano : - C D E Tempered Gamut . Natural Gamut . Tempered Gamut . Natural Gamut . • • 258.7 258.7 G 387.6 388.0 • • · 290.3 291.0 A ...
Página 903
... gives rise to 15 vibrations ; and in order to know the number of vibrations corresponding to the note emitted , it is only necessary to have a means of counting the revolutions . This is furnished by a counter , which is represented in ...
... gives rise to 15 vibrations ; and in order to know the number of vibrations corresponding to the note emitted , it is only necessary to have a means of counting the revolutions . This is furnished by a counter , which is represented in ...
Página 904
... gives the number of vibrations in the interval , whence the number of vibrations per second is computed by division . 896. Graphic Method . In the hands of a skilful operator , with a good musical ear , the siren is capable of yielding ...
... gives the number of vibrations in the interval , whence the number of vibrations per second is computed by division . 896. Graphic Method . In the hands of a skilful operator , with a good musical ear , the siren is capable of yielding ...
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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