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Which consequence results when laser light encounters acoustic-optic modulation?

A)Frequency shift altering laser color
B)Amplitude attenuation reduces beam intensity
C)Speckle pattern degrades beam uniformity
D)Spatial coherence elongates pulse duration

💡 Explanation

Acoustic-optic modulation introduces a frequency shift due to the acousto-optic effect because the sound waves act as a moving diffraction grating thereby modulating the output beam; therefore the lasers' color changes, rather than the amplitude or spatial characteristics which would arise from different systems.

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