The London, Edinburgh and Dublin Philosophical Magazine and Journal of ScienceTaylor & Francis, 1912 - English periodicals |
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Common terms and phrases
absorption actinium æther alpha rays aluminium angle apparatus approximately assumption atom bands calculated carbon cathode cent charge chlorine coefficient collision constant contact difference corresponding curve deflexion delta rays density determined difference of potential distance distribution drops effect electric electrometer electrons electroscope emission emitted energy equal equation equilibrium ethyl bromide expansion experimental experiments field flame formula function gases give given heat hydrogen increase intensity ionization ionization current ions isoclinic lines J. J. Thomson light liquid magnetic maximum means measured mercury metal method molecules motion number of electrons number of ions observed obtained paper particles Phil plate platinum polonium positive carriers potential difference pressure produced quantity quaternion radiation radium ratio salt secondary shown solution spectrum strip strontium suppose surface Table temperature theory thorium tube vapour velocity vibrations volts wave-length
Popular passages
Page 1001 - Influence of the Contact Difference of Potential Between the Plates Emitting and Receiving Electrons Liberated by Ultra-Violet Light in the Measurement of the Velocities of These Electrons ; During the war Aeronautical Eng.
Page 455 - ... the number of molecules of caloric generated is such that their total energy is equal to the work originally spent in friction. In this connection it is interesting to note that Sir JJ Thomson, in a recent paper on ionisation by moving particles, has arrived, on other grounds, at the conclusion that the character of the radiation emitted during the recombination of the ions will be a series of pulses, each pulse containing the same amount of energy and being of the same type as very soft X rays....
Page 606 - For instance, the probability of finding a molecule in the "volume" element du dv dw (ie, a molecule having velocity components between u and u + du, v and v + dv, w...
Page 150 - It would seem that the electrical forces act with peculiar advantage. If we suppose that upon the whole the air cannot be removed, so that the 'mean distance between the opposed surfaces remains constant, the electric attractions tend to produce an instability whereby the smaller intervals are diminished while the larger are increased. Extremely local contacts of the liquids, while opposed by capillary tension which tends to keep the surfaces flat, are thus favoured by the electrical forces, which...
Page 434 - With the aid of sunlight it was proved that in the reflexion at moderate incidences there was no marked chromatic selection, and in all probability the blackness of the band in the yellow at grazing incidences is a matter of contrast only. Indeed, calculation shows that according to Fresnel's formula?, the reflexion would be nearly insensible for all parts of the spectrum when the index is adjusted for the yellow." It was further shown that the reflexion could be reduced, but not destroyed, by re-polishing...
Page 495 - ... or with our ordinary notions of space and time, thereby freeing the theory from the least appearance of paradox. The method pursued is in some sense a return to the point of view of Lorentz,§...
Page 200 - the large currents hitherto obtained with heated carbon cannot be ascribed to the emission of electrons from carbon itself, but that they are probably due to some reaction at high temperatures between the carbon, or contained impurities, and the surrounding gases, which involves the emission of electrons.
Page 739 - ... solvent is characterized by a definite absorption spectrum. When a salt is dissolved in mixtures of varying proportions of two solvents only two definite absorption spectra appear, one being characteristic of each solvent. One spectrum does not gradually change into the other as the composition of tho mixed solvent changes, but only the relative intensities of the two spectra vary.
Page 738 - XX 3455, 3500, and 3540. The other groups of absorption bands of neodymium nitrate in the different solvents show differences in the wave-lengths comparable with the above; but these results suffice to show the effect of the solvent on the power of neodymium...
Page 738 - ... differences in the wave-lengths comparable with the above; but these results suffice to show the effect of the solvent on the power of neodymium nitrate to absorb light. The above evidence that the solvent plays an important part in the absorption of light by substances dissolved in it is strong.