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ifos • paper_2 • solid_state_electronicsifos-2020-subject-08-001

Hard uniform sphere — UPSC IFoS 2020 Physics PYQ

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Consider atoms as hard, uniform spheres and packed closely together so that they fold touch one another. Calculate the number of atoms per cubic unit cell and fraction of volume occupied for simple cubic, body-centred and face-centred cubic structures.

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