The London, Edinburgh and Dublin Philosophical Magazine and Journal of ScienceTaylor & Francis, 1921 - Physics |
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Common terms and phrases
a-particles absorption anemometer angle anode approximately argon assumed atoms axis beam benzene beta particles boundary calculated cent centre chlorine circuit coefficient coil collision colour constant convection corresponding crystal curve d₁ deflexion determined diameter distance effect electric electrons elements energy equal equation experiments expression filament film formula frequency function gamma rays given gives grid heat helium horizontal hydrogen increase inductance intensity ionization ionization chamber J. J. Thomson layer light lines liquid magnetic maximum measured method molecule motion nitrogen number of electrons observed obtained paper particles Phil phosphorus Phys plane plate positive charge potential pressure primary quantity radius ratio resistance rhodopsin rotation scattering screen shown solution spectrum surface Table Talbot's bands temperature theory thorium tube vapour vector velocity voltage volts W. H. Bragg wave-length wire zero
Popular passages
Page 890 - by the ratio of the specific heat at constant pressure to the specific heat at constant volume,
Page 305 - and v is the frequency. In virtue of the absorbed energy, the electron acquires a certain velocity and pursues a certain free path in the medium till diverted by collision. (4) The value of the mean free path of electrons taking part in photoelectric emission from platinum has been determined by Robinson (Phil.
Page 312 - the results of these researches the main fact is that, in the uninjured eye of the vertebrate, the incidence of light causes an electrical change in such a direction that the nervous layer of the retina becomes electrically positive to the rod and cone layer." It will be seen
Page 303 - communicated to the Rontgen Society. In this theory he supposes " that photoelectric action takes place in the rods or cones, so that we have a separation of electrons resulting in electrification of the nervecells which set up the nervous impulse to the brain." An essentially
Page 900 - it is interesting to note that Einstein (Ann. d. Physik, iv. 3, p. 513 (1901)) has put forward a view that the surface energy of a liquid is of the nature of potential energy expressible by a certain equation, one of whose terms depends on the atomic weight. This is exactly what our formula does,
Page 309 - and energy of these electrons remain characteristic of the frequency. Such stimuli are too few and too brief to confuse one with another by overlapping. They are appreciated at their cerebral destination as would be successive notes heard in music. The penetration of the faster electrons into the nerve must be considerable. A maximum free
Page 902 - in favour of the view that the properties of surface tension can be considered as not depending upon the mutual attraction of molecules. For, if the free molecule has about it this elastic envelope, it is plain that the envelope cannot be material at all. It is simply a force and nothing more.
Page 305 - well ascertained facts of photoelectric science the following concern the present theory, (a) The electron is liberated with a, velocity which, normally, depends on the frequency of the light only : increasing as the wavelength diminishes in such a way as to render the kinetic energy
Page 248 - The Thermal Effect produced by a slow Current of Air flowing past a Series of fine heated Platinum Wires, and its Application to the Construction of HotWire Anemometers of great Sensitivity, especially applicable to the Investigation of slow Rates of Flow of Gases.