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← ScienceWhich outcome occurs when partially coherent light illuminates imperfections?
A)Speckle pattern forms on surfaces✓
B)Chromatic aberration gets corrected
C)Reflectivity of surface greatly increases
D)Perfect interference fringes are clearly visible
💡 Explanation
Speckle patterns form due to random interference of coherent waves because phase relationships are maintained after reflection from rough surfaces giving constructive and destructive interference. Therefore, speckle forms, rather than perfect fringes, due to less-than-perfect source coherence.
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