Philosophical MagazineTaylor & Francis., 1918 - Physics |
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Results 1-5 of 62
Page 2
... element of area repre- sented by dx is μ ( du / dy ) dx , where μ is the viscosity , so that the element of volume ( dx dy ) is subject to the force μ ( d3u / dy3 ) dx dy . Since there is no acceleration , this force is balanced by that ...
... element of area repre- sented by dx is μ ( du / dy ) dx , where μ is the viscosity , so that the element of volume ( dx dy ) is subject to the force μ ( d3u / dy3 ) dx dy . Since there is no acceleration , this force is balanced by that ...
Page 32
... elements of an originally plane wave produced by the passage through a given lens . The example selected for the present purpose relates to the simplest possible lens , viz . the plano - convex lens , traversed by a beam of finite ...
... elements of an originally plane wave produced by the passage through a given lens . The example selected for the present purpose relates to the simplest possible lens , viz . the plano - convex lens , traversed by a beam of finite ...
Page 33
... element of the reference surface , r its distance from the point P in question , e the light velocity and λ = c7 the wave - length , in vacuo . Then the usual way of applying Huyghens ' principle gives , for the luminous vibration at P ...
... element of the reference surface , r its distance from the point P in question , e the light velocity and λ = c7 the wave - length , in vacuo . Then the usual way of applying Huyghens ' principle gives , for the luminous vibration at P ...
Page 36
... element is fully given by dz = ein - Bu ) Jo ( au ) .du . Thus the sloping angle e at any point of the P - curve will be ε = n― Bu , the length ... elements dl corresponding to equal steps du , for 36 Dr. L. Silberstein on Light Distribution.
... element is fully given by dz = ein - Bu ) Jo ( au ) .du . Thus the sloping angle e at any point of the P - curve will be ε = n― Bu , the length ... elements dl corresponding to equal steps du , for 36 Dr. L. Silberstein on Light Distribution.
Page 37
arc elements dl corresponding to equal steps du , for axial points P ( a = 0 ) , are all equal , as in the case of the Cornu spiral . Outside the optical axis , however , the steps dl become smaller and smaller as we approach the first ...
arc elements dl corresponding to equal steps du , for axial points P ( a = 0 ) , are all equal , as in the case of the Cornu spiral . Outside the optical axis , however , the steps dl become smaller and smaller as we approach the first ...
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Common terms and phrases
aberration absorption line æther angle aperture approximation axis bands C. V. Raman calculated centre Charnockite coefficient components compounds constant Cornu spiral corresponding curve cyclone cylinder determined diameter diffraction direction displacement distance distribution doublets edge effect electrical electron elements energy equal equation excited experimental expression factor focal plane formula frequency fringes function give given gneisses heat hornblendic inertia integral intensity iodine ions J. J. Thomson length lens light Lord Rayleigh masses maximum mercury method minima molecules motion nodal points observed obtained optical orbit order group P₁ paper Phil Plate position potential pressure Prof radiation radius ratio reflected rays schists shown sin² spectrum spheres spherical aberration stoma stomata surface Table temperature theory tube v₁ velocity vibrations wave-length waves width wind zero
Popular passages
Page 252 - IN the previous communication a general account of the results which have been obtained, up to the present time, on the resonance spectra of iodine has been given.
Page 140 - Antitiiuric (west-south-west to east-north-east) to the Persian (northwest to south-east) direction, and it also marks the point of intersection of this fracture with a great north-east to north-west fracture (Caucasian direction), which delimits on the south Lake Van and the faulted depression of the Plain of Mush, abruptly cutting off the Tauric horst of pre-Devonian marbles and micaschists. 2. Numerous flows of augite-rhyolite built up the vast cone of the Nimrud Dagh, and the increasing pressure...
Page 113 - The investigation was carried out in the Physical Laboratory of the Indian Association for the Cultivation of Science, Calcutta, and the writer's best thanks are due to Prof.
Page 162 - Wellenberuhigurig," •by MM Richter (see NATURE, vol. xlix. p. 488), the opinion is expressed that the tendency of oil to spread itself on water is only due to the free oleic acid contained in it, and that if it were possible to completely purify the oil from oleic acid, it would not spread at all. This I found to be actually the ca<e with olive oil, and though I agree by no means with the theoretical...
Page 442 - Full prospectus post free on application. BLACKIE & SON, Ltd., 50 OLD BAILEY, LONDON, EG 4.
Page 4 - Vol. xxn. p. 39 (1913). so. As an alternative to an inclined plane surface, consideration is given to a. broken surface consisting of two parts, each of which is parallel to the first plane surface but at a different distance from it. It appears that this is the form which must be approached if we wish the total pressure supported to be a maximum, when the length of the bearing and the closest approach are prescribed. In these questions we may anticipate that our calculations correspond pretty closely...
Page 50 - E a light may be obtained from a Cooper-Hewett MercuryVapour Lamp, combined with a suitable filter. The light from the source is reflected by the adjustable mirror A through the condensing-lens B, by means of which it is condensed on the aperture of the diaphragm C. The diverging beam of light is collimated by a lens D, and falls as a parallel beam on a plane parallel plate K, the second surface of which is silvered lightly so that a part of the Fig. 1. Diagram of Prism Interferometer. light is transmitted...
Page 273 - BV -„ / ku ._. kp^=\0p\/ — per unit area. ... (7) Then the amount evaporated between 0 and x over a strip dy in diameter is by integration Finally, if the length of the strip from one margin to the other be /, and parts near enough to the edges for the end corrections at both ends to be important be neglected, the amount evaporated can be found at once to be (8) taken over the whole area.
Page 442 - OPTIK" of Dr. ADOLPH STEINHEIL and Dr. ERNEST VOIT. Translated and Edited by JAMES WEIR FRENCH, B.Sc.
Page 140 - Armenia came into existence ut a period when the sedimentary rocks could no longer be folded, but were fractured along definite lines, and Nimrud is situated on the great fracture transverse to the Armenian folds at the apex of their bending round from the Antitauric (west-southwest to east-north-east) to the Persian (north-west to south-east) direction, and it also marks the point of intersection of this fracture with a great north-east to north-west fracture (Caucasian direction), which delimits...