Introduction to Contemporary PhysicsMacmillan, 1926 - 453 pagine |
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alpha-particles amount angle angular momentum anode argon atom-model atomic number atomic weight axis Balmer series beam bombarding cathode Chapter charge-to-mass ratio chemical circular orbits column corresponding curve dark space deflections determined discharge distance doublet effect elec electric field electron-stream electrons elements ellipse emitted energy-values equal equation equivalent volts excited experimental experiments fact fieldstrength frequency gases helium atom hydrogen atom impacts instance integer multiple interpreted inverse-square ionized atom ionized helium ionizing-energy ionizing-potential ions isotopes J. J. Thomson kinds of ions kinetic energy line-series lines magnetic field magnetic moment mass measurements mercury metal method molecules normal nuclear atom-model nucleus of charge observed particles Periodic Table phenomena physics plate positive ions potential properties quantum quantum-number radiation resonance-potential revolving scattered sequence sodium space-charge spectra spectrum speed Stationary supposed theory tion transitions trons valence-electron vapor various vibration voltage wavelength X-ray Zeeman effect
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Pagina 440 - Crookes dark space, the negative glow, the Faraday dark space, and the positive column.
Pagina 2 - Relationships of exactly this sort have been found to hold absolutely without exception, no matter in what gas the drops have been suspended or what sort of droplets were used upon which to catch the ions. In many cases a given drop has been held under observation for five or six hours at a time and has been seen to catch not eight or ten ions, as in the experiment above, but hundreds of them.
Pagina 2 - ... but hundreds of them. Indeed, I have observed, all told, the capture of many thousands of ions in this way, and in no case have I ever found one the charge of which, when tested as above, did not have either exactly the value of the smallest charge ever captured or else a very small multiple of that value. Here, then, is direct, unimpeachable proof that the electron is not a "statistical mean...
Pagina 116 - Darrow as follows : Where Planck in 1900 had said simply that bound electrons emit and absorb energy in fixed finite quantities, and shortly afterwards had softened his novel idea as far as possible by making it apply only to the act of emission, Einstein in 1905 rushed boldly in and presented the idea that these fixed finite quantities of radiant energy retain their identity throughout their wanderings through space from the moment of emission to the moment of absorption. This idea he offered as...
Pagina 130 - It is as if one dropped a plank into the sea from a height of 100 ft. and found that the spreading ripple was able, after travelling 1,000 miles and becoming infinitesimal in comparison with its original amount, to act upon a wooden ship in such a way that a plank of that ship flew out of its place to a height of 100 ft.
Pagina 38 - Sans doute, si nos moyens d'investigation devenaient de plus en plus pénétrants, nous découvririons le simple sous le complexe, puis le complexe sous le simple, puis de nouveau le simple sous le complexe, et ainsi de suite, sans que nous puissions prévoir quel sera le dernier terme.
Pagina 348 - ... permitted" orbits, and to no others, so that by these features the permitted orbits are set apart from all the rest. Inversely, anyone who is told what these features are, and who is sufficiently adept in dynamics, can trace all the orbits which display them and calculate the energy-values for these orbits and so predict the energyvalues of all of the Stationary States of an atom consisting of a nucleus and a single electron. Such orbits are known as quantized orbits. The rules...
Pagina 108 - ... earth from the sun— light in all times has been a recognized and conspicuous feature of the physical world, a perpetual reminder that the material, the tangible, the palpable substances are not the only real ones.