Elementary Treatise on Natural Philosophy, Volumen4D. Appleton, 1891 |
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Página 860
... RESULTANT TONES . Concord and discord , 929. Helmholtz's theory , 930. Beats of harmonics , 931. Beating notes must be near in pitch , 932. Imperfect concord , 933. Resultant tones , 934 , 935 , pp . 941-946 . OPTICS . CHAPTER LXVII ...
... RESULTANT TONES . Concord and discord , 929. Helmholtz's theory , 930. Beats of harmonics , 931. Beating notes must be near in pitch , 932. Imperfect concord , 933. Resultant tones , 934 , 935 , pp . 941-946 . OPTICS . CHAPTER LXVII ...
Página 862
... resultant of forces . Mean analogous to centre of gravity , 1073. Cone of colour . Hue , depth , and brightness . Complemen- taries . All hues except purple are spectral , 1074. Three primary colour - sensations , red , green , and ...
... resultant of forces . Mean analogous to centre of gravity , 1073. Cone of colour . Hue , depth , and brightness . Complemen- taries . All hues except purple are spectral , 1074. Three primary colour - sensations , red , green , and ...
Página 889
... resultant of the mo- tions due to each system separately . When these 5 2 Fig . 613. -Ear - trumpets . Fig . 612 . Speaking - trumpet . component motions are in the same direction the resultant is their 1 Theory of Sound , vol . ii . p ...
... resultant of the mo- tions due to each system separately . When these 5 2 Fig . 613. -Ear - trumpets . Fig . 612 . Speaking - trumpet . component motions are in the same direction the resultant is their 1 Theory of Sound , vol . ii . p ...
Página 895
... resultant of the two sets is y = asin m10 + a sin m20 - = 2a sin ( m1 + m2 ) 0. cos } ( m1 − M2 ) 0 . - - By hypothesis m1 is m2 very small compared with m1 + m2 ; hence the factor cos 1⁄2 ( m1 — m2 ) 0 remains nearly constant for an ...
... resultant of the two sets is y = asin m10 + a sin m20 - = 2a sin ( m1 + m2 ) 0. cos } ( m1 − M2 ) 0 . - - By hypothesis m1 is m2 very small compared with m1 + m2 ; hence the factor cos 1⁄2 ( m1 — m2 ) 0 remains nearly constant for an ...
Página 929
... resultant of these two component motions , is often extremely beautiful . Some varieties of it are represented in Fig . 634 . Instead of throwing the curves on a screen , we may see them by looking into the second mirror , either with a ...
... resultant of these two component motions , is often extremely beautiful . Some varieties of it are represented in Fig . 634 . Instead of throwing the curves on a screen , we may see them by looking into the second mirror , either with a ...
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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