Posted: August 18th, 2017

If ‘a’ stands for the edge length of the cubic systems: simple cubic, body centered cubic and face centered cubic, then the ratio of radii of the spheres in these systems will be _______ respectively

If ‘a’ stands for the edge length of the cubic
systems: simple cubic, body centered cubic
and face centered cubic, then the ratio of radii
of the spheres in these systems will be
_______ respectively.
[CBSE (PMT) 2008; J & K CET 2010]
(A) 1
2
a :
3
2
a :
3
2
a
(B) 1a : 3 a : 2 a
(C) 1
2
a :
3
4
a :
1
2 2
a
(D) 1
2
a : 3 a :
1
2
a