Elementary Treatise on Natural Philosophy, Volumen4D. Appleton, 1891 |
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Página 861
... spectra , 1055. Spectrum analysis , 1056. Inferences from dark lines in solar spectrum , 1057. Observations of chromosphere . Spectra of nebulæ , 1058. Doppler's principle , 1059. Spectra of artificial lights . Bodies illuminated by ...
... spectra , 1055. Spectrum analysis , 1056. Inferences from dark lines in solar spectrum , 1057. Observations of chromosphere . Spectra of nebulæ , 1058. Doppler's principle , 1059. Spectra of artificial lights . Bodies illuminated by ...
Página 862
Augustin Privat-Deschanel Joseph David Everett. glass plate ; rotating disc ; overlapping spectra . A mixture may be either a mean or a sum . Colour equations , 1071. Helmholtz's crossed slits , and Maxwell's colour- box , 1072. Results ...
Augustin Privat-Deschanel Joseph David Everett. glass plate ; rotating disc ; overlapping spectra . A mixture may be either a mean or a sum . Colour equations , 1071. Helmholtz's crossed slits , and Maxwell's colour- box , 1072. Results ...
Página 1058
... consists of two parallel threads , which can thus be moved to any distance apart , and can also be turned round in their own plane . CHAPTER LXXII . DISPERSION . STUDY OF SPECTRA . 1045. 1058 VISION AND OPTICAL INSTRUMENTS .
... consists of two parallel threads , which can thus be moved to any distance apart , and can also be turned round in their own plane . CHAPTER LXXII . DISPERSION . STUDY OF SPECTRA . 1045. 1058 VISION AND OPTICAL INSTRUMENTS .
Página 1060
... constituents by the following experiment , which is also due to Newton , and was the first demonstration of the composite character of solar light . SOLAR SPECTRUM . 1061 Let a beam of sun - 1060 STUDY OF SPECTRA . DISPERSION .
... constituents by the following experiment , which is also due to Newton , and was the first demonstration of the composite character of solar light . SOLAR SPECTRUM . 1061 Let a beam of sun - 1060 STUDY OF SPECTRA . DISPERSION .
Página 1064
... wanting , but so feeble as to appear black by contrast . 2 This property is called the irrationality of dispersion . PHOSPHORESCENCE . 1065 investigation , as glass largely absorbs the 1064 DISPERSION . STUDY OF SPECTRA .
... wanting , but so feeble as to appear black by contrast . 2 This property is called the irrationality of dispersion . PHOSPHORESCENCE . 1065 investigation , as glass largely absorbs the 1064 DISPERSION . STUDY OF SPECTRA .
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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