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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
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\(200 \mathrm{pm}\)
\(d\)-spacing
\(=\frac{\mathrm{n} \lambda}{2 \sin \theta}=\frac{2 \times 100}{2 \times \sin 30^{\circ}}=200 \mathrm{pm}\)
\(=\frac{\mathrm{n} \lambda}{2 \sin \theta}=\frac{2 \times 100}{2 \times \sin 30^{\circ}}=200 \mathrm{pm}\)
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