Question

Find the lattice parameter \(a\) for a simple cubic crystal refracting an X-Ray \((\lambda = 1.54\ \text{\AA})\) at an angle \(45^\circ\) from a plane having Miller indices \((1,1,0)\) at order \((n=1)\).

• A. \(1.54\ \text{\AA}\)
• B. \(3.08\ \text{\AA}\)
• C. \(0.77\ \text{\AA}\)
• D. \(2.12\ \text{\AA}\)

Hint:

For cubic crystals, first find \(d\) using Bragg's law, then use \(d=\frac{a}{\sqrt{h^2+k^2+l^2}}\).

Answer 1

The Correct Option is A