Question

If 'a' stands for the edge length of the cubic systems - The ratio of radii in simple cubic, body centered cubic and face centered cubic unit cells is

• A. $1a:\sqrt3a:\sqrt2a$
• B. $\frac{1}{2}a:\frac{\sqrt3}{4}a:\frac{1}{2\sqrt2}a$
• C. $\frac{1}{2}a:\frac{\sqrt3}{2}a:\frac{\sqrt2}{2}a$
• D. $\frac{1}{2}a:\sqrt3a:\frac{1}{\sqrt2}a$

Answer 1

Answer: (B)

$\frac{1}{2}a:\frac{\sqrt3}{4}a:\frac{1}{2\sqrt2}a$

Answer 2

The correct answer is (B) : $\frac{1}{2}a:\frac{\sqrt3}{4}a:\frac{1}{2\sqrt2}a$/