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← ScienceWhich outcome reduces fringe visibility during white-light interferometry?
A)Increased optical path difference✓
B)Decreased source coherence length
C)Minimized beam splitter reflectivity
D)Optimized detector integration time
💡 Explanation
Increased optical path difference degrades interference effects because constructive/destructive interference requires phase correlation. The mechanism is spatial coherence; therefore, fringes wash out because polychromatic light has limited coherence rather than specific wavelengths reinforcing.
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