Elementary Treatise on Natural Philosophy, Volumen4D. Appleton, 1891 |
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Página 865
... fix one end C of a straight spring CD ( Fig . 592 ) in a vice A , then draw the other end D aside into the position D ' , and let it go . In virtue of its elasticity ( § 126 ) , the spring will re- turn to its original position ; but ...
... fix one end C of a straight spring CD ( Fig . 592 ) in a vice A , then draw the other end D aside into the position D ' , and let it go . In virtue of its elasticity ( § 126 ) , the spring will re- turn to its original position ; but ...
Página 867
... fixed on a stand , in such a posi- tion as to be nearly in contact with a glass bell ( Fig . 593 ) . If a rosined fiddle - bow is then drawn over the edge of the bell , until a musical note is emitted , a series of taps are heard , due ...
... fixed on a stand , in such a posi- tion as to be nearly in contact with a glass bell ( Fig . 593 ) . If a rosined fiddle - bow is then drawn over the edge of the bell , until a musical note is emitted , a series of taps are heard , due ...
Página 869
... fixed in a vice ; it is then seen to execute a series of small oscillations - each end being alternately raised and depressed — and a sound is at the same time emitted . The oscillations are so small as to be scarcely perceptible in ...
... fixed in a vice ; it is then seen to execute a series of small oscillations - each end being alternately raised and depressed — and a sound is at the same time emitted . The oscillations are so small as to be scarcely perceptible in ...
Página 886
... fixed obstacle they are reflected , and the two sets of waves - one direct , and the other reflected - are propagated just as if they came from two separate sources . If the reflecting surface is plane , waves di- verging from any ...
... fixed obstacle they are reflected , and the two sets of waves - one direct , and the other reflected - are propagated just as if they came from two separate sources . If the reflecting surface is plane , waves di- verging from any ...
Página 900
... fixed by the rule that A ( the middle A of a piano , or the A string of a violin ) is to have 435 complete vibrations per second in the tempered gamut . This is rather lower than the concert - pitch which has prevailed in this country ...
... fixed by the rule that A ( the middle A of a piano , or the A string of a violin ) is to have 435 complete vibrations per second in the tempered gamut . This is rather lower than the concert - pitch which has prevailed in this country ...
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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