Spectrum analysis, 6 lects |
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Seite xiii
... INTENSITIES OF HEATING , LUMINOUS , AND CHEMICALLY ACTIVE RAYS IN SOLAR SPECTRUM 6. TYNDALL'S EXPERIMENTS ON CALORESCENCE . 12 14 7. - EXPLOSION OF CHLORINE AND HYDROGEN BY MAGNESIUM LIGHT 8. - CHEMICAL ACTION OF BLUE RAYS SHOWN . 16 17 ...
... INTENSITIES OF HEATING , LUMINOUS , AND CHEMICALLY ACTIVE RAYS IN SOLAR SPECTRUM 6. TYNDALL'S EXPERIMENTS ON CALORESCENCE . 12 14 7. - EXPLOSION OF CHLORINE AND HYDROGEN BY MAGNESIUM LIGHT 8. - CHEMICAL ACTION OF BLUE RAYS SHOWN . 16 17 ...
Seite 9
... intensity of vibration , sometimes being minute and shallow like the ripples on the surface of a pond , some- times rising and falling into the gigantic crests and valleys of the storm - ridden ocean ; so also the undulations of the ...
... intensity of vibration , sometimes being minute and shallow like the ripples on the surface of a pond , some- times rising and falling into the gigantic crests and valleys of the storm - ridden ocean ; so also the undulations of the ...
Seite 10
sir Henry Enfield Roscoe. of the ether producing light differ in amplitude and intensity , giving rise to the different effects of colour to which we have referred . Let us now compare the power of the ear and the eye , the one to ...
sir Henry Enfield Roscoe. of the ether producing light differ in amplitude and intensity , giving rise to the different effects of colour to which we have referred . Let us now compare the power of the ear and the eye , the one to ...
Seite 12
... intensity of the heating , luminous , and chemi- cally active rays in the various parts of the solar spectrum . The figure exhibits three curves , A , B , and C , showing the distribution of these three actions produced by the rays of ...
... intensity of the heating , luminous , and chemi- cally active rays in the various parts of the solar spectrum . The figure exhibits three curves , A , B , and C , showing the distribution of these three actions produced by the rays of ...
Seite 13
... intensity of each at any point of the spectrum is measured by the vertical line drawn from the point on the base line to meet its proper curve . Whilst noticing these peculiar properties of the dif- ferent rays , we must carefully ...
... intensity of each at any point of the spectrum is measured by the vertical line drawn from the point on the base line to meet its proper curve . Whilst noticing these peculiar properties of the dif- ferent rays , we must carefully ...
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absorption acid alkaline Ångström apparatus appear Appendix bands barium blue bodies bright bands bright lines Bunsen cæsium calcium carbon Chemical Elements chemically active chloride coincidence colour comet compounds contains continuous spectrum dark lines detected diagram didymium double line earth electric spark emitted examination exhibits existence experiments Fe 5 Fe Fe Fe flame Fourth Series Fraunhofer Fraunhofer's gaseous gases give green heated Huggins hydrochloric acid hydrogen hydrogen line inch instrument intensity iron Kirchhoff lecture lens light lithium luminous magnesium metallic lines millimetre motion nebula nitrogen object-glass observed obtained pass peculiar Phil placed PLATE platinum portion position potassium present prism produced quantity rays reaction refracting refrangible rubidium salts scale seen Sirius slit sodium sodium line solar atmosphere solar lines solar spectrum spectra spectroscope spectrum analysis stellar strontium substance sun's telescope temperature thallium Trans tube vapour violet visible volatile whilst wire yellow
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Seite 92 - The colours thus communicated by the different bases to flame afford, in many cases, a ready and neat way of detecting extremely minute Quantities of them...
Seite 36 - ... tis a sense of that motion under the form of a sound; so colours in the object are nothing but a disposition to reflect this or that sort of rays more copiously than the rest...
Seite 272 - ... something of the motions of the stars relatively to our system. If the stars were moving towards or from the earth, their motion, compounded with the earth's motion, would alter to an observer on the earth the refrangibility of the light emitted by. them, and consequently the lines of terrestrial substances would no longer coincide in position in the spectrum with the dark lines produced by the absorption of the vapours of the same substances existing in the stars.
Seite 298 - F, rather greater than half the interval between b and F. The third band occurs about midway between D and E. In the two more refrangible of these bands the light was brightest at the less refrangible end, and gradually diminished towards the other limit of the bands. The least refrangible of the three bands did not exhibit a similar gradation of brightness. These...
Seite 248 - ... whose mottled and curdling light evidently indicates by a sort of granular texture its consisting of stars, and when examined under the great light of Lord Rosse's...
Seite 117 - For instance, the orange ray may be the effect of the strontia, since Mr. Herschel found in the flame of muriate of strontia a ray of that colour. If this opinion should be correct, and applicable to the other definite rays, a glance at the prismatic spectrum of a flame may show it to contain substances which it would otherwise require a laborious chemical analysis to detect.
Seite 305 - ... the substances by which in both cases the light was emitted. The great fixity of carbon seems, indeed, to raise some difficulty in the way of accepting the apparently obvious inference from these prismatic observations. Some comets have approached sufficiently near the sun to acquire a temperature high enough to convert even carbon into vapour.
Seite 246 - It may be, therefore, that the occurrence of this one line only, indicates a form of matter more elementary than nitrogen, and which our analysis has not yet enabled us to detect. " In a similar manner the faintest of the lines was found to coincide with the green line of hydrogen.
Seite 177 - A, which can be removed at pleasure. Below the prism is an achromatic eye-piece, having an adjustable slit between the two lenses ; the upper lens being furnished with a screw motion to focus the slit. A side slit, capable of adjustment, admits, when required, a second beam of light from any object whose spectrum it is desired to compare with that of the object placed on the stage of the Microscope. This second beam of light strikes against a very small prism suitably placed inside the apparatus,...
Seite 236 - In the first place, then, the result at which we have arrived is that the constitution of the starlight, although not identical with the light given off by the sun, is yet similar ; that is to say, the light of a fixed star gives off a continuous spectrum, interspersed by dark shadows or bands ; and hence the conclusion we come to is that the physical constitution of the fixed stars is similar to that of our sun, that their light also emanates from intensely white-hot matter, and passes through an...