Q95 · CSIR-NET Chemistry, June 2013

Paper: CSIR-NET June 2013 · Subject: Physical Chemistry · Chapter: Solid State Chemistry · Topic: X Ray Diffraction Bragg · Marks: 2 · Difficulty: Medium

A plane of spacing 'd' shows first order Bragg diffraction at angle $\theta$. A plane of spacing 2d
(a)shows Bragg diffraction at $2 \theta$
(b)shows Bragg diffraction at $\theta / 2$
(c)shows Bragg diffraction at $\sin^{-1}(\sin\theta/2)$
(d)shows Bragg diffraction at $\sin^{-1}(\sin 2\theta/2)$
Answer
Answer: C ✓ checked by 4AB · confidence high
Explanation
λ = 2d sin θ = 2(2d) sin θ′ ⇒ sin θ′ = sin θ/2 ⇒ θ′ = sin⁻¹(sin θ/2).

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