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Question: Answered & Verified by Expert
The second order Bragg's diffraction of X-rays of wavelength \(100 \mathrm{pm}\) from a set of parallel lattice planes in a metal occurs at a grazing angle of \(30^{\circ}\). The spacing between the successive scattering planes in the cystal is
ChemistryStructure of AtomVITEEEVITEEE 2023
Options:
  • A \(50 \mathrm{pm}\)
  • B \(100 \mathrm{pm}\)
  • C \(150 \mathrm{pm}\)
  • D \(200 \mathrm{pm}\)
Solution:
1101 Upvotes Verified Answer
The correct answer is: \(200 \mathrm{pm}\)
\(d\)-spacing
\(=\frac{\mathrm{n} \lambda}{2 \sin \theta}=\frac{2 \times 100}{2 \times \sin 30^{\circ}}=200 \mathrm{pm}\)

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