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The refractive index of a solid is obser...

The refractive index of a solid is observed to have the same value along all direction. Comment on the nature of this solid. Would it show cleavage property?

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Glass is an amorphous solid. Like liquids, it has a tendency to flow, though very slowly. This can be seen from the galss panes of windows or doors of very old buildings which are thickerat the bottom than at the top. Therefore, glass is considered as a supercooled liquid.
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