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Article | REF: AF3332 V1

Fluid mechanics - Visualization by index variation

Authors: Jean-Pierre PRENEL, Paul SMIGIELSKI

Publication date: July 10, 1999

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1. General

Consider two points A and B in a medium of refractive index n (x, y, z ) and assume that light follows a certain curve C to get from A to B [31][32] . The time taken for the light to complete the path AB is expressed by the curvilinear integral : t=∫ABncds

c being the speed of light in a vacuum and s the curvilinear abscissa on curve C.

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