Which outcome occurs when partially coherent light illuminates imperfections?

💡 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.

• Which consequence results when compressive stress misaligns birefringent polymer chains?
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