Question

Consider a beam of X-rays of wavelength 0.13 nm which is diffracted by (100) plane of rock salt with lattice constant of 0.26 nm . Fetermining the glancing angle
for the second-order diffraction.
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Answer 1

Explanation:

A beam of X-rays of wavelength 0.071 nm is diffracted by (110) plane of rock salt with lattice constant of 0.28 nm. Find the glancing angle for the second-order diffraction.

(Set-1–Sept. 2007),(Set-2, Set-3–Sept.2006), (Set-2–May 2006), (Set-3–May 2004), (Set-4–May 2003)

Sol: Given data are:

Wavelength (λ) of X-rays = 0.071 nm

Lattice constant (a) = 0.28 nm

Plane (hkl) = (110)

Order of diffraction = 2

Glancing angle θ = ?

Bragg’s law is 2d sin θ = nλ

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Substitute in Bragg’s equation

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