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← ScienceWhich consequence results when laser light encounters acousto-optic modulation?
A)Wavelength shift of the input beam✓
B)Increased coherence of the beam
C)Reduced speckle contrast ratio
D)Suppression of harmonic frequencies
💡 Explanation
Acousto-optic modulation leads to a frequency, and therefore wavelength, shift in the diffracted laser light because the diffraction involves transfer of momentum and energy. Therefore, wavelength changes occur rather than simple coherence alteration which affects speckle contrast, or harmonic suppression.
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