Raman, C. V. ; Ramaseshan, S. (1949) Diffraction of light by transparent spheres and spheroids: the Fresnel patterns Proceedings of the Indian Academy of Sciences, Section A, 30 (6). pp. 277-283. ISSN 0370-0089
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Official URL: http://www.ias.ac.in/j_archive/proca/30/6/277-283/...
Related URL: http://dx.doi.org/10.1007/BF03048744
Abstract
The paper describes and discusses the diffraction effects observed when a beam of light traverses a transparent sphere immersed in a liquid of slightly lower index and emerges therefrom. The two most interesting features are firstly, a concentration of intensity along the periphery of the emerging light beam which is evidently in the nature of a caustic and secondly, a concentration of intensity along the axial ray which is in the nature of a continuous focus. These two features are each accompanied by a set of interference-rings and these appear superposed on each other. Significant alterations appear in these features when the particle has a spheroidal shape. With a birefringent sphere, two sets of caustics are, in general, observed. 12 Photographs illustrate the paper.
Item Type: | Article |
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Source: | Copyright of this article belongs to Indian Academy of Sciences. |
ID Code: | 35127 |
Deposited On: | 17 Apr 2011 14:20 |
Last Modified: | 17 May 2016 18:02 |
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