The London, Edinburgh and Dublin Philosophical Magazine and Journal of ScienceTaylor & Francis, 1923 - Physics |
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Page 7
... determined except through measurements , which at once re - introduce None For a fuller discussion of the distinction , see ' Nature , ' Feb. 27 , 1921 , 806-809 . PP : + Phil . Mag . vol . xlii . pp . 369-390 ( 1921 ) . material scales ...
... determined except through measurements , which at once re - introduce None For a fuller discussion of the distinction , see ' Nature , ' Feb. 27 , 1921 , 806-809 . PP : + Phil . Mag . vol . xlii . pp . 369-390 ( 1921 ) . material scales ...
Page 32
... determined value of intensity and wave - length of light of a source , and cannot be applied a priori to all sources whatever their brighiness and colour . In a case of two point - sources , we can often consider two points as resolved ...
... determined value of intensity and wave - length of light of a source , and cannot be applied a priori to all sources whatever their brighiness and colour . In a case of two point - sources , we can often consider two points as resolved ...
Page 36
... determined as the roots of the equation 4.J12 ( ≈ ) , 4J2 ( D— :) + ( D - 2 ) 2 = max . ( 10 ) The displacements of the maxima for the different distances D are given in Table II . and Pl . II . fig . 2 . TABLE II . D. Δε . 2Az . 3.8 0 ...
... determined as the roots of the equation 4.J12 ( ≈ ) , 4J2 ( D— :) + ( D - 2 ) 2 = max . ( 10 ) The displacements of the maxima for the different distances D are given in Table II . and Pl . II . fig . 2 . TABLE II . D. Δε . 2Az . 3.8 0 ...
Page 56
... determined the smallest differences between the breadth of two white contours on a black ground that can be perceived by the eye . He found this difference stated in angular measure to be as little as 10 seconds of arc ( 0.73 μ at ...
... determined the smallest differences between the breadth of two white contours on a black ground that can be perceived by the eye . He found this difference stated in angular measure to be as little as 10 seconds of arc ( 0.73 μ at ...
Page 61
... determined in the first method by means of a mechanical contrivance , and in the second method by means of imaginary sub- divisions of the millimetre into tenths ( and possibly into hundredths ) by the eye . For convenience , these two ...
... determined in the first method by means of a mechanical contrivance , and in the second method by means of imaginary sub- divisions of the millimetre into tenths ( and possibly into hundredths ) by the eye . For convenience , these two ...
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absorption actinium alloys angle apparatus approximately argon armature assume atomic number atomic weight auroral axis Balmer series calculated carbon cent centre charge circuit coefficient collision colour constant corresponding cubic curves deflexion density diameter distance edge effect electric electrons elements emission energy equal equation experimental experiments filament formula frequency galvanometer gases given helium Heusler alloys hydrogen illumination increase intensity investigation ionization ionizing potential ions J. J. Thomson light limit lines magnetic field maximum mean measured mercury method molecules motion negative nitrogen observed obtained orbit oscillation paper particles Phil Phys plane plate positive potential pressure produced protactinium quantum radiation ratio rays scattering shown sodium solution spectrum straight edge surface Table temperature theory tube uranium values vapour velocity voltage volts wave-length X-ray zero
Popular passages
Page 1130 - MILLION. Containing the least factor of every number not divisible by 2, 3 or 5 between 3,000,000 and 4,000,000.
Page 440 - Professor Japp in his Presidential Address to the Chemical Section of the British Association...
Page 1020 - ... systematic fashion how they achieved their aims. If the discovery of laws could be reduced to a set of formal rules, anyone who learnt the rules could discover laws. But there is no broad road to progress. Herein lies the most serious objection to much that has been written on the methods of science. There is no method, and it is because there is no method which can be expounded to all the world that science is a delight to those who possess the instincts which make methods unnecessary.
Page 837 - The object of the present paper is to show how it is possible to account theoretically for the main features of the phenomena of X-ray absorption and continuous X-ray emission discussed above.
Page 14 - Again it is obvious that even if it were possible to perceive by the senses that the sum of the angles of a triangle is equal to two right angles, we should still require a proof of this ; we should not (as some d fact remains that the object perceived is only one particular instance of the type.
Page 870 - The experiments described in this paper were carried out in order to provide more systematic evidence on the liquid-like behaviour of the growing film.
Page 492 - The evidence appears quite conclusive that every sample of silver iodide studied contained the cubic form; in a few cases none but the cubic structure was evident; in some, one or two faint lines were present which belonged only to the hexagonal form; while in most of the samples the hexagonal form predominated. No systematic study was made of the conditions governing the production of one crystal form or the other; the first sample showing the cubic form was prepared by precipitation; the other...
Page 46 - H. NAGAOKA. Diffraction Phenomena in the Focal Plane of a Telescope with Circular Aperture, due to a Finite Source of Light.