Question

If r is the radius of an atom and a is an edge length of fcc unit cell, then

(a). r = \(\frac{\sqrt3}{4}\)a

(b). r = \(\frac{a}{2\sqrt2}\) 

(c). r = \(\frac{a}{2}\) 

(d). r = 2√2a

Answer 1

Option : (b). r = \(\frac{a}{2\sqrt2}\)