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. $\frac{1}{2}$ a: $\frac{\sqrt{3}}{2}a:\frac{\sqrt{2}}{2}a$
• B. $\frac{1}{2}a:\sqrt{3}a:\frac{1}{\sqrt{2}}a$
• C. $1a:\sqrt{3}a:\sqrt{2}a$
• D. $\frac{1}{2}a:\frac{\sqrt{3}}{4}a:\frac{1}{2\sqrt{2}}a$

Answer 1

Answer: (D)

Correct answer is (d) $\frac{1}{2}a:\frac{\sqrt{3}}{4}a:\frac{1}{2\sqrt{2}}a$