Image formation by an optically stratified medium: optics of mirage and looming

Sodha, M. S. ; Aggarwal, A. K. ; Kaw, P. K. (1967) Image formation by an optically stratified medium: optics of mirage and looming British Journal of Applied Physics, 18 (4). pp. 503-511. ISSN 0508-3443

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Official URL: http://iopscience.iop.org/0508-3443/18/4/313

Related URL: http://dx.doi.org/10.1088/0508-3443/18/4/313

Abstract

An analytical theory of image formation in an optically stratified medium, with particular reference to the phenomena of mirage and looming, is presented; it is assumed that the variation of refractive index with height is exponential. The images in neither mirage nor looming are formed on the same vertical line as the object, a result contrary to popular notions. Some other interesting results are the prediction of a maximum as well as a minimum in the range of observation of mirage, the prediction of a maximum and minimum height of the object, for points outside which mirage is not seen, the prediction of a minimum in the range of observation of looming and finally the prediction of a maximum height of the object, for points above which looming is not observable. Some numerical calculations have also been made, and a physical discussion of the results is given.

Item Type:Article
Source:Copyright of this article belongs to Institute of Physics.
ID Code:25057
Deposited On:01 Dec 2010 12:13
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