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← ScienceWhich optical outcome increases within a microchannel interferometer under flow?
A)Fringe shift relative pathlength difference✓
B)Fresnel diffraction at the slit edge
C)Chromatic dispersion of the material
D)Speckle pattern from surface roughness
💡 Explanation
Increased flow produces proportionally shifted interference fringes because the change in fluid refractive index results in a greater effective pathlength difference via optical interference. Therefore fringe shift increases, rather than diffraction effects or dispersion since those are less related to flow-induced refractive variations.
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