X - rays of wavelength 0.140 nm are reflected from a certain crystal, and the first - order maximum occurs at an angle of 14.4°. What value does this give for the interplanar spacing of the crystal?

A certain device for analyzing electromagnetic radiation is based on the Bragg scattering of the radiation from a crystal. For radiation of wavelength 0.149 nm, the first-order Bragg peak appears centered at an angle of 15.15°. The aperture of the analyzer passes radiation in the angular range of 0.015°. What is the corresponding range of wavelengths passing through the analyzer?

Tungsten is a very high density, high melting point, and hard metal. These properties are partially due to its body centered cubic (BCC) crystal structure. Tungsten has an atomic number of 74 and an average mass of 183.8u. (1u = 1.661x10-27 kg). X-ray diffraction experiments determine that the Bravais lattice has a characteristic length of 3.155 Å (This means each side of the cube shown below has a length of 0.3155 nm.) How many complete tungsten atoms are there in each BCC unit cell?

Potassium iodide has an interplanar spacing of d = 0.296 nm. A monochromatic X-ray beam shows a first-order diffraction maximum when the grazing angle is 7.2°. Calculate the X-ray wavelength 1. λ = nm