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Which consequence result when excessive localized heating affects amorphous silica?

A)Devitrification forms crystalline phases
B)Decreased refractive index occurs
C)Viscosity remains roughly constant
D)Photoelasticity response remains linear

💡 Explanation

Excessive heating provides energy to overcome the activation energy barrier; therefore devitrification allows atoms to rearrange into ordered, crystalline structures because it activates nucleation and crystal growth, rather than maintaining the amorphous arrangement because the atoms must transition between phases.

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