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A sample of a crystalline solid scatters...

A sample of a crystalline solid scatters a beam of X-rays of wavelength `70.93` pm at an angle `2 theta` of `14.66^(@)`. If this is a second-order reflection `(n = 2),` calculate the distance between the parallel planers of atoms from which the scattered beam appears to have been reflected.

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The correct Answer is:
556.3 pm
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