The edge lengths of the unit cells in terms of the radius of spheres constituting fcc, bcc and simple cubic unit cells are respectively .......
1
\(2\sqrt {2r,} \frac{{4r}}{{\sqrt 3 }},2r\)
2
\(\frac{{4r}}{{\sqrt 3 }},2\sqrt {2r,} 2r\)
3
\(2r,2\sqrt {2r,\frac{{4r}}{{\sqrt 3 }}} \)
4
\(2r,\frac{{4r}}{{\sqrt 3 }},2\sqrt {2r} \)