Conduction of Electricity Through GasesUniversity Press, 1906 - 678 páginas |
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Términos y frases comunes
absorption aluminium anode atom carbonic acid cathode fall cathode rays centimetre cm./sec collisions constant cubic centimetre curve cylinder dark space deflection density diffusion diminishes discharge distance effect electric field electric force electrodes electrometer electromotive force emitted equal equation experiments fall of potential flame gases given greater H. A. Wilson hence hydrogen incandescent increase ionisation ions produced J. J. Thomson k₁ k₂ layer Lenard luminosity magnetic field magnetic force mean free path measured molecules negative electricity negative glow negative ions negatively electrified number of corpuscles number of ions oxygen parallel particles passing Phil Phys plane platinum positive column positive ions potential difference proportional pulse radio-active radium rate of leak right angles Röntgen rays Rutherford saturation secondary radiation shown spark length spark potential substance surface temperature thickness thorium tube ultra-violet light value of e/m vapour velocity vessel volts Wied wire
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Página 159 - ... made direct comparison possible. Hence it may be taken to have been proved that e=E, or that the charge on the gaseous ion is equal to the charge carried by the hydrogen ion in the electrolysis of solutions. But what is the mass associated with this constant charge in the particles which act as the carriers of electricity in conduction through gases, and how does it compare with that of the carriers which in the case of conduction through solutions are atoms or groups of atoms, and whose absolute...
Página 101 - A-,, the velocity of the ion which carries it ; thus since the velocity of the negative ion is greater than that of the positive...
Página 36 - To observe the current of electricity through the gas, the illuminated plate was connected with one pair of quadrants of an electrometer, the other pair of quadrants being kept connected with the earth.
Página 198 - ... centimeter of surface. This fact may have an important application to some cosmical phenomena, since, according to the generally received opinion, the photosphere of the sun contains large quantities of glowing carbon; this carbon will emit corpuscles unless the sun by the loss of its corpuscles at an earlier stage has acquired such a large charge of positive electricity that the attraction of this is sufficient to prevent the negatively electrified particles from getting right away from the...
Página 178 - ... of atmospheric electricity ; for if the negative ions, say, were to differ in their power of condensing water around them from the positive, then we might get a cloud formed round one set of ions and not round the other. The ions in the cloud would fall under gravity, and thus we might have separation of positive and negative ions and the production of an electric field, the work required for the production of the field being done by gravity.
Página 152 - For compressible flow this becomes: where y is the ratio of the specific heat at constant pressure to that at constant volume...
Página 119 - Thus we have an electric field between the plates the lines of force of which are at right angles to the lines of magnetic force and to the direction of motion of the...
Página 151 - Since 9=Pi-p, where p\ is the density of the water-vapour before condensation begins, and p the density at the temperature t ; hence we have ,,, Since p is a function of t, this equation enables us to determine t. If x is the ratio of the final to the initial volume and...
Página 659 - An electromagnetic wave in space has both an electric and a magnetic field intensity which are at right angles to each other and to the direction of propagation of the wave. The two field intensities are related to each other by &