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← ScienceWhich consequence occurs when pulsed laser light coherence collapses?
A)Speckle pattern visibility diminishes sharply✓
B)Wavelength shifts toward extreme ultraviolet
C)Pulse duration steadily shortens further
D)Beam divergence decreases proportionally linearly
💡 Explanation
Reduced temporal coherence in pulsed lasers causes blurred interference because different parts of the pulse no longer maintain a constant phase relationship, leading to decreased speckle contrast. Therefore, speckle visibility diminishes, rather than increased directionality or shifted wavelengths.
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