Which outcome occurs when an anti-reflective coating degrades on a space telescope's lens?

💡 Explanation

When the coating degrades, intermolecular forces such as Van der Waals between the polymer molecules are broken because UV radiation cleaves the chemical bonds (C-O, Si-O); This increases surface scattering, leading to increased reflection reducing optical transparency. Therefore, increased reflection result, rather than aberrations, thermal changes or instability which are due temperature fluctuations, defects or external forces.

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