In a hexagonal close packed (hcp) structure of spheres, the fraction of the volume occupied by the sphere is A.In a cubic close packed structure, the fraction is B. The relation for A and B is

In a hexagonal close packed (hcp) structure of spheres, the fraction o

1.	In a hexagonal close packed (hcp) structure of spheres, the fraction of the volume occupied by the sphere is A.In a cubic close packed structure, the fraction is B. The relation for A and B is
Answer» `A=B` `ALTB` `AGTB` A is equal to the fraction in a SIMPLE cubic lattice Solution :Fraction of the SPACE occupied in c.c.p. and h.c.p. arrangement is the same.