The Radioactive Substances: Their Properties and BehaviourK. Paul, Trench, Trübner & Company, Limited, 1908 - 301 pagini |
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Pagina 8
... less rapidly than the electromotive force , ultimately becoming nearly constant , and when this state is reached the current is said to be " saturated . " This term has been borrowed from the somewhat analogous behaviour of iron ...
... less rapidly than the electromotive force , ultimately becoming nearly constant , and when this state is reached the current is said to be " saturated . " This term has been borrowed from the somewhat analogous behaviour of iron ...
Pagina 20
... less than 31 per cent , only the negative ions acted as condensation nuclei and not the positive . The drops of water so formed may be easily seen in a beam of light , and although their number per cubic centi- metre cannot be directly ...
... less than 31 per cent , only the negative ions acted as condensation nuclei and not the positive . The drops of water so formed may be easily seen in a beam of light , and although their number per cubic centi- metre cannot be directly ...
Pagina 23
... less than 1 millimetre of mercury a complicated series of phenomena can be seen as the dis- charge passes . With the various features of the discharge and their significance we are not here concerned , but there are certain phenomena to ...
... less than 1 millimetre of mercury a complicated series of phenomena can be seen as the dis- charge passes . With the various features of the discharge and their significance we are not here concerned , but there are certain phenomena to ...
Pagina 32
... less opaque to this particular kind of radiation the shadow cast on the screen will be darker or lighter . In this way , for example , the shadow of the bones of the hand may be pro- jected upon such a screen . For the rays can pass ...
... less opaque to this particular kind of radiation the shadow cast on the screen will be darker or lighter . In this way , for example , the shadow of the bones of the hand may be pro- jected upon such a screen . For the rays can pass ...
Pagina 33
... less ; but the transparency also depends upon the particular rays used . If the vacuum . in the tube from which the rays originate is very high it is found that the Röntgen rays emitted are far more penetrating than when the vacuum is less ...
... less ; but the transparency also depends upon the particular rays used . If the vacuum . in the tube from which the rays originate is very high it is found that the Röntgen rays emitted are far more penetrating than when the vacuum is less ...
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Termeni și expresii frecvente
absorption actinium active deposit ALPHA RAYS aluminium atomic weight barium Becquerel bismuth Boltwood cathode rays centimetres charge carried charged particles chemical considered contained corpuscles crystals Curie and Danne deflected density detected discovery effect electric field electrolysis electrometer electroscope emana experiments exposed fact fluorescence formed Fourth Edition gases gramme of radium heat helium hydrogen Illustrations insulated ionization J. J. Thomson known light LL.D Madame Curie magnetic field matter measured metals method minerals nature negative ions negatively charged obtained passing phenomena Phil pitchblende polonium present pressure produced properties quantity of emanation quantity of radium radiation emitted radio radioactive bodies radioactive elements radioactive substances radium bromide radium chloride radium emanation radium salt rate of decay removed Röntgen rays Rutherford Rutherford and Soddy seen separated shown solution temperature thorium thorium emanation tion transformed tube uranium velocity vessel weight of radium wire