Elementary Treatise on Natural Philosophy, Volumen4D. Appleton, 1891 |
Dentro del libro
Resultados 1-5 de 54
Página 861
... piece , 1032 , Galilean telescope . Its peculiarities . Opera - glass , 1033. Reflecting telescopes , 1034. Silvered specula , 1035. Measure of brightness ; intrinsic and effective , 1036 . Surfaces are equally bright at all distances ...
... piece , 1032 , Galilean telescope . Its peculiarities . Opera - glass , 1033. Reflecting telescopes , 1034. Silvered specula , 1035. Measure of brightness ; intrinsic and effective , 1036 . Surfaces are equally bright at all distances ...
Página 888
... , furnished at this end with a hollow mouth - piece , which nearly fits the lips , and at SPEAKING AND HEARING TRUMPETS . 889 the other with a. Fig . 611. - Echo . Fig . 616. - Vibroscope . 888 PRODUCTION AND PROPAGATION OF SOUND .
... , furnished at this end with a hollow mouth - piece , which nearly fits the lips , and at SPEAKING AND HEARING TRUMPETS . 889 the other with a. Fig . 611. - Echo . Fig . 616. - Vibroscope . 888 PRODUCTION AND PROPAGATION OF SOUND .
Página 889
... piece . These light membranes are peculiarly susceptible of impression from aerial vibrations . In Reg- nault's experiments above cited , it was found that mem- branes were affected at dis- tances greater than those at which sound was ...
... piece . These light membranes are peculiarly susceptible of impression from aerial vibrations . In Reg- nault's experiments above cited , it was found that mem- branes were affected at dis- tances greater than those at which sound was ...
Página 899
... piece of music , and may have any pitch whatever . In order to obtain perfect har- mony , the above ratios should be accurately maintained whatever the key - note may be . 892. Tempered Gamut . — A great variety of keys are employed in ...
... piece of music , and may have any pitch whatever . In order to obtain perfect har- mony , the above ratios should be accurately maintained whatever the key - note may be . 892. Tempered Gamut . — A great variety of keys are employed in ...
Página 904
... piece of smoked paper is gummed round a cylinder , which can be turned by a handle , a screw cut on the axis VIBROSCOPE AND PHONAUTOGRAPH . 905 causing it at the same. Fig . 616. - Vibroscope . Fig . 617. - Traces by Phonautograph . Fig ...
... piece of smoked paper is gummed round a cylinder , which can be turned by a handle , a screw cut on the axis VIBROSCOPE AND PHONAUTOGRAPH . 905 causing it at the same. Fig . 616. - Vibroscope . Fig . 617. - Traces by Phonautograph . Fig ...
Otras ediciones - Ver todas
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