Foundations of Materials Science and Engineering
6th Edition
ISBN: 9781259696558
Author: SMITH
Publisher: MCG
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Chapter 15.10, Problem 48AAP
To determine
Describe the fabrication of optical fibers for communications systems. Explain how the refractive index of the silica glass is affected by (a) germanium oxide
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4. For 0-20 x-ray diffraction (2=1.5A) from a fcc sample, if the (111) diffraction peak
appears at 20-37.1º, what is the lattice constant of this sample?
5. For 0-20 x-ray diffraction (λ=1.5A) from simple cubic polycrystals (a=3.5Å), how
many diffraction peaks are in the 0°<20<90° range? Give the index of the lattice for
each diffraction peak.
Do non-crystalline material display the phenomenon of allotropy? Why or why not?
In your own words
The metal niobium has a BCC crystal structure. If the angle of diffraction for the (211) set of planes occurs at 75.99° (first-order
reflection) when monochromatic x-radiation having a wavelength of 0.1659 nm is used, compute the following:
(a) The interplanar spacing for this set of planes
i
nm
(b) The atomic radius for a Nb atom
nm
Chapter 15 Solutions
Foundations of Materials Science and Engineering
Ch. 15.10 - Write the equation relating the energy of...Ch. 15.10 - Prob. 2KCPCh. 15.10 - Prob. 3KCPCh. 15.10 - Prob. 4KCPCh. 15.10 - Prob. 5KCPCh. 15.10 - Explain why metals absorb and/or reflect incident...Ch. 15.10 - Prob. 7KCPCh. 15.10 - Prob. 8KCPCh. 15.10 - Prob. 9KCPCh. 15.10 - Prob. 10KCP
Ch. 15.10 - Prob. 11KCPCh. 15.10 - Prob. 12KCPCh. 15.10 - Prob. 13KCPCh. 15.10 - Prob. 14KCPCh. 15.10 - Prob. 15KCPCh. 15.10 - Prob. 16KCPCh. 15.10 - What are the basic elements of an optical-fiber...Ch. 15.10 - Prob. 18KCPCh. 15.10 - Explain how optical fibers act as waveguides.Ch. 15.10 - Prob. 20KCPCh. 15.10 - Prob. 21KCPCh. 15.10 - Prob. 22KCPCh. 15.10 - Prob. 23KCPCh. 15.10 - Prob. 24KCPCh. 15.10 - Prob. 25KCPCh. 15.10 - Why are type I superconductors poor...Ch. 15.10 - Prob. 27KCPCh. 15.10 - Prob. 28KCPCh. 15.10 - Prob. 29KCPCh. 15.10 - Prob. 30KCPCh. 15.10 - Prob. 31KCPCh. 15.10 - Prob. 32AAPCh. 15.10 - A semiconductor emits green visible radiation at a...Ch. 15.10 - Prob. 34AAPCh. 15.10 - Calculate the reflectivity of ordinary light from...Ch. 15.10 - Prob. 36AAPCh. 15.10 - Prob. 37AAPCh. 15.10 - Prob. 38AAPCh. 15.10 - Prob. 39AAPCh. 15.10 - Prob. 40AAPCh. 15.10 - Prob. 41AAPCh. 15.10 - Prob. 42AAPCh. 15.10 - Prob. 43AAPCh. 15.10 - Prob. 44AAPCh. 15.10 - Prob. 45AAPCh. 15.10 - Prob. 46AAPCh. 15.10 - Prob. 47AAPCh. 15.10 - Prob. 48AAPCh. 15.10 - Prob. 49AAPCh. 15.10 - Prob. 50AAPCh. 15.10 - Prob. 51AAPCh. 15.10 - Prob. 52SEPCh. 15.10 - Prob. 53SEPCh. 15.10 - Prob. 54SEPCh. 15.10 - Prob. 55SEPCh. 15.10 - Prob. 56SEP
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- What is the dipole moment? Why dipole-dipole interaction of moleculesis very important phenomena for living organisms.arrow_forwardqjly21 For FCC iron, calculate the diffraction angle for the (220) set of planes. The lattice parameter for Fe is 0.3571 nm. Assume that monochromatic radiation having a wavelength of 0.1540 nm is used, and the order of reflection is 1.arrow_forwardFor which set of crystallographic planes will a first-order diffraction peak occur at a diffrac- tion angle of 46.21° for BCC iron when mono- chromatic radiation having a wavelength of 0.0711 nm is used?arrow_forward
- A cell culture is covered with a 1 cm sheet of Lucite (density=1.19 g/cm^3). What thickness of lead (in cm) is needed on top of the Lucite to prevent 10MeV beta rays from reaching the culture? Use the approximate empirical formulas relating range Rin g/cm^2 to electron kinetic energy T in MeV:arrow_forward(a) T (b) c) Convert the [110] and [001] directions into the four-index Miller-Bravais scheme for hexagonal unit cellsarrow_forwardWhat is Bragg's law? How is it used in X-ray diffraction?arrow_forward
- What is the coordination number for atoms in the HCP structure? How does this compare to the coordination number for FCC? How would you expect HCP and FCC to compare in terms of APF? Which would be greater? (or would they be the same?)arrow_forwardTungsten (W) crystallizes in cubic structure. The edge length of the unit cell of this crystal structure is a = 3.1648 Å. Calculate the structure factor Fhkl for this crystal structure for the (110) and (200) planes. Here the scattering factor is fW (110) = 58 and fW (200) = 51. In this crystal structure, two W atoms are in (0,0,0) and (0.5,0.5,0.5) positions, respectively.arrow_forwardQuestion 2: (Problem 2.6) An optical fiber for telecommunication is made of SIO2 glass (density 2.20 Mg/m) How many Si atoms and how many O atoms are present per millimeter of length (L 1 mm) of a fiber 10 um in diameter (d-10 mm)? Given M(Si)-28.09 g mole M(OF16gmole Avogadro's Number AN=0.6203 (10) Solution.arrow_forward
- What is the expected diffraction angle (20) for the first-order retlection from the (220) set of planes for FCC iridium (atomic radius of iridium is 0.1357 nm) when monochromatic radiation of wavelength 0.1542 nm is used? Oa 69 Ob 81 Oc 27 Od 180 Oe 46arrow_forward(a) Define and give one example of a geometry that is coordinatively unsaturated. (b) Define and give one example of a geometry that can be stereochemically non-rigid.arrow_forwardbriefly explain how with the help of x-ray diffraction techniques, the lattice dimensions are determinedarrow_forward
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