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Problem 8: An X-ray beam of wavelength 0.48 × 10-10 is used to get Brag reflection from a crystal at an angle of 20o for the first order maxima. What are the possible layer spacing which gives rise to this maxima?

Solution

Given data
Wavelength used =λ = 0.48 × 10-10 m,
Angle of incidence = 20o
Order of fringe (maxima) = 1

Required

Layer spacing = d =?

Formula

From Brag’s law           2dsinθ = mλ

Put the values,

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