For a simple cubic crystal, X-ray diffraction shows intense reflections for angles $\theta_{1}$ and $\theta_{2}$ which are assigned to [1 0 1] and [1 1 1] planes, respectively. The ratio $\sin \theta_{1} / \sin \theta_{2}$ is
(a)1.5
(b)1.22
(c)0.82
(d)0.67
Answer
Answer: C ✓ checked by 4AB · confidence high
Explanation
sin θ ∝ √(h² + k² + l²): sin θ₁/sin θ₂ = √2/√3 = 0.82.