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In a powder diffraction photograph of copper (fcc structure with a lattice parameter of 0.3608 nm) taken with a cu-ka radiation (? = 0.154 nm), the Bragg angle for the first line is

In a powder diffraction photograph of copper (fcc structure with a lattice parameter of 0.3608 nm) taken with a cu-ka radiation (? = 0.154 nm), the Bragg angle for the first line is Correct Answer 12.3°

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