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Which optical interference consequence results when a laser's temporal coherence drastically decreases?

A)Fringe visibility decreases significantly
B)Speckle pattern contrast increases
C)Spatial resolution improves dramatically
D)Non-linear light mixing is enhanced

💡 Explanation

Decreased temporal coherence causes reduced fringe visibility, because the interference fringes are only sharply defined if the path length difference is less than the coherence length; therefore, the fringes wash out rather than stay distinct as coherence diminishes.

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