Elementary Treatise on Natural Philosophy, Volumen4D. Appleton, 1891 |
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Página 862
... ordinary ray spherical , for extra- ordinary ray spheroidal . Extraordinary index . Property of tourmaline , 1105 . Nicol's prism , 1106. Colours produced by thin plates of selenite , 1107. Rectilinear vibration changed to elliptic ...
... ordinary ray spherical , for extra- ordinary ray spheroidal . Extraordinary index . Property of tourmaline , 1105 . Nicol's prism , 1106. Colours produced by thin plates of selenite , 1107. Rectilinear vibration changed to elliptic ...
Página 869
... ordinary coal - gas . Trevelyan Experiment . — A fire - shovel ( Fig . 598 ) is heated , and balanced upon the edges of two sheets of lead fixed in a vice ; it is then seen to execute a series of small oscillations - each end being ...
... ordinary coal - gas . Trevelyan Experiment . — A fire - shovel ( Fig . 598 ) is heated , and balanced upon the edges of two sheets of lead fixed in a vice ; it is then seen to execute a series of small oscillations - each end being ...
Página 880
... ordinary Centigrade tempera- 1 A recent determination by Mr. Stone at the Cape of Good Hope is worthy of note as being based on the comparison of observations made through the sense of hearing alone . It had previously been suggested ...
... ordinary Centigrade tempera- 1 A recent determination by Mr. Stone at the Cape of Good Hope is worthy of note as being based on the comparison of observations made through the sense of hearing alone . It had previously been suggested ...
Página 896
... pitch depends solely on frequency of vibration , that is to say , on the number of vibrations executed per unit time . In QUALITIES OF SOUNDS . 897 ordinary circumstances this frequency is NUMERICAL EVALUATION OF SOUND.
... pitch depends solely on frequency of vibration , that is to say , on the number of vibrations executed per unit time . In QUALITIES OF SOUNDS . 897 ordinary circumstances this frequency is NUMERICAL EVALUATION OF SOUND.
Página 897
Augustin Privat-Deschanel Joseph David Everett. QUALITIES OF SOUNDS . 897 ordinary circumstances this frequency is the same for the source of sound , the medium of transmission , and the drum of the ear of the person hearing ; and in ...
Augustin Privat-Deschanel Joseph David Everett. QUALITIES OF SOUNDS . 897 ordinary circumstances this frequency is the same for the source of sound , the medium of transmission , and the drum of the ear of the person hearing ; and in ...
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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