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← ScienceWhich consequence occurs when a laser beam encounters excessive particulates?
A)Speckle pattern contrast is diminished✓
B)Coherence length substantially increases
C)Beam intensity profile remains constant
D)Wavelength instability gets suppressed
💡 Explanation
When laser beam encounters excessive particulates, diffraction occurs, which degrades the coherence reducing speckle contrast because increased scattering reduces constructive interference; therefore, the speckle contrast diminishes, rather than intensity or promoting wavelength instability.
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