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Which of the steps is not needed to determine whether the Bragg condition is fulfilled?
All of these steps are necessary
O Calculate their respective interplanar distances
O Calculate the angle 0 for all the set of lattice planes
Index all the set of lattice planes that can fulfill the condition
O Determine whether the Bragg condition is fulfilled knowing the wavelength of X-rays

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PROBLEM For a given x-ray diffraction test (n = 1) on a cubic crystal structure, the recorded diffraction peaks (20) were 24.09°, 34.33°, 42.37°, 49.33°, 55.62°, and 61.48°. The x-ray wavelength used in the test was 0.15418 nm. For this test, determine the crystal structure of the element, the lattice constant, and identify the element.
3.2 (a) Determine the absorption coefficient for Si illumination form radiation with wavelength equal to 0.5 μm. (b) Calculate the thickness of Si that will absorb 60, 70, 80 and 90% of the photon energy/cm²s
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The vanadium crystallizes in the body centered cubic lattice with a lattice parameter a. The X-ray diffraction data were collected from this compound and the following first four Bragg positions 20 (degrees): 21.06, 30.17, 37.03 and 43.10 were registered. The wavelength of the used X-ray radiation is 2 = 1.54Á. 1- Give the Bragg's Law. 2- Determine the inter-planer spacing d of the family of lattice planes (hke) of the cubic system. hkt 3 - Using the structure factor, determine the allowed reflections of the body centered cubic. 4- Index the four Bragg angles given above and calculate the cell parameter a.