In FCC unit cell, what fraction of edge is not covered by atoms? (a) \( 0.134 \) (b) \( 0.293 \)...

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In FCC unit cell, what fraction of edge is not covered by atoms?
(a) \( 0.134 \)
(b) \( 0.293 \)
(c) \( 0.26 \)
(d) \( 0.32 \)
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