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Which risk increases when applying partially coherent laser light to measure sub-wavelength structures?

A)Speckle noise degrades image resolution
B)Increased chromatic aberration blurs features
C)Photobleaching rapidly degrades the specimen
D)Thermal lensing induces sample distortions

💡 Explanation

Speckle noise from *interference* reduces image resolution because the light source's partial coherence causes random constructive/destructive interference patterns. Therefore, increased speckle noise is the outcome, rather than chromatic aberration resulting from polychromatic sources or photobleaching/thermal lensing requiring higher power.

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