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← ScienceWhich 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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