Bragg diffraction

Chemistry Level pending

A diffraction pattern of aluminum is obtained by using X-rays with wavelength \(\lambda = 0.709 \times 10^{-10}\) m. The third-order Bragg diffraction from the parallel faces of the cubic unit cells is observed at the angle \(2\theta=20.2^{\circ}.\) What is the lattice parameter \(d?\)

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