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← HistoryWhich risk increased when Mughal artisans extended the size of the marble panels used in Pietra Dura mosaics?
A)Mortar joint stress concentration
B)Differential thermal expansion weakens✓
C)Material creep amplifies over time
D)Crystal lattice dislocation formations widen
💡 Explanation
The differential thermal expansion risk grows because the longer expanse of vastly different tesserae materials expands and contracts to temperature fluctuations at different rates creating internal shear stress, therefore mosaics are undermined rather than staying integrated under variable field conditions.
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