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← ScienceWhich artifact typically occurs when partially coherent light illuminates distant objects?
A)Speckle pattern reduces visual acuity✓
B)Chromatic aberration causes fringing near edges
C)Spherical aberration distorts telescope focusing
D)Coma creates smeared star images off-axis
💡 Explanation
Speckle occurs because partial coherence causes interference adding constructively and destructively. Therefore speckle patterns appear depending on propagation rather than blurring from aberrations such as coma given focusing errors.
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