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← ScienceWhich consequence arises when coherent light diverges excessively?
A)Speckle contrast decreases significantly
B)Overall system's resolution degrades notably✓
C)Signal-to-noise ratio increases linearly
D)Spatial coherence remains mostly uniform
💡 Explanation
Excessive divergence introduces phase variations, suppressing constructive interference based on the principle of wavefront division in Imaging, therefore causing resolution to drop rather than causing less speckle; speckle reduction requires multiple uncorrelated beams, not simple divergence.
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