Engineering Physics

Solved Problems

1.     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

Substitute in Bragg’s equation

2.     A beam of X-rays is incident ...