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Problem 9: The spacing of one set of crystal planes in NaCl (table salt) is d = 0.282 nm. A monochromatic beam of X-rays produces a Bragg maximum when its glancing angle with these planes is θ = 7°. Assuming that this is a first order maximum (n = 1) find the wave length of the X-rays.



Spacing of crystal planes = d = 0.282 nm = 0.282 × 10-9 m

Glancing angle = 7°                          n = 1


Wave length of the incident X-rays, λ

Formula:              2dsinθ = nλ

Put values in the formula,


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