The London, Edinburgh and Dublin Philosophical Magazine and Journal of ScienceTaylor & Francis, 1923 - Physics |
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Results 1-5 of 86
Page 45
... approximately the same as the illumination at the first bright ring due to the brighter source or less than this , the first bright ring over- laps the light of the central spot of the second source and we have no critical distance for ...
... approximately the same as the illumination at the first bright ring due to the brighter source or less than this , the first bright ring over- laps the light of the central spot of the second source and we have no critical distance for ...
Page 48
... approximately corresponds to the posit of a minimum of illumination on a meridional line , becor of greater curvature . As in the previous case of two points of equal brightne it is more than probable that for some cases the eye can ...
... approximately corresponds to the posit of a minimum of illumination on a meridional line , becor of greater curvature . As in the previous case of two points of equal brightne it is more than probable that for some cases the eye can ...
Page 53
... approximately 3 mm . , that the maximum theo- retical resolving power is very nearly attained . It should , however , be carefully noted with regard to these experimental limits that they have been obtained as the result of tests ...
... approximately 3 mm . , that the maximum theo- retical resolving power is very nearly attained . It should , however , be carefully noted with regard to these experimental limits that they have been obtained as the result of tests ...
Page 54
... make them visible . Now , since the formula for the resolving power of then if white light is in use , the microscope is R = λ 2 N.A. λ = 5800 A.U. approximately , and the N.A. required 54 Dr. H. Hartridge on the Limits to the.
... make them visible . Now , since the formula for the resolving power of then if white light is in use , the microscope is R = λ 2 N.A. λ = 5800 A.U. approximately , and the N.A. required 54 Dr. H. Hartridge on the Limits to the.
Page 55
... approximately 4 times . too small even for well - marked structures . The distance separating the images on the retina at the magnification of 500 required by the author's eye becomes 17.5 μ , which corresponds roughly to 5 times the ...
... approximately 4 times . too small even for well - marked structures . The distance separating the images on the retina at the magnification of 500 required by the author's eye becomes 17.5 μ , which corresponds roughly to 5 times the ...
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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.