A diffraction pattern of a cubic crystal of lattice parameter a = 3.16 A⁰ is obtained with monochromatic X-ray beam of wavelength 1.54 A⁰, the first line on this pattern was observed to have θ = 30⁰, the interplanar spacing will be

A)1.54 A⁰
B)3.1 A⁰
C)11.2 A⁰
D)9.3 A⁰




Answer : A) 1.54 A⁰
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