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← ScienceWhich diffraction outcome occurs from narrowband source variation?
A)Decreased fringe visibility, decreased coherence✓
B)Increased intensity modulation resolution limit
C)Increased spatial wavelength angular separation
D)Reduced central maxima diffraction efficiency
💡 Explanation
Source incoherence causes fringe blurring; therefore, decreased fringe visibility results because spatial coherence diminishes due to averaging effects of many incoherent sources emitting with temporal variations. Rather than increased sharpness from coherence.
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