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 :
c being the speed of light in a vacuum and s the curvilinear abscissa on curve C.
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General
Bibliography
Text references
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(1) - CHENG (K.C.) -
A history of Flow Visualization : Chronology.
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Journal or Flow Visualization and Image Processing 4-1, 1997, p. 9-27.
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(2) - MERZKIRCH (W.) -
Flow Visualization.
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Academic Press, 1987....
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Shadow method: ombrography or ombroscopy
