The unit cell in a body centred cubic lattice is given in the figure. Each sphere has a radius ,r and the cube has a side ,a . What fraction of the total cube volume is empty ?

The unit cell in a body centred cubic lattice is given in the figure.

1.	The unit cell in a body centred cubic lattice is given in the figure. Each sphere has a radius ,r and the cube has a side ,a . What fraction of the total cube volume is empty ?
Answer» `1-(8)/(3)PI(R^(3))/(a^(3))` `(4)/(3)*pi(r^(3))/(a^(3))` `(r)/(a)` `2-(4)/(3)pi(r^(3))/(a^(3))` Answer :D