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,