Which of these is right? a. Acceptor impurities introduce excess electrons. b. Donor contaminants cause more holes c. When there is a net spatial separation of positively charged particles, polarization is said to arise & on an atomic or molecular level, negatively charged substances d. At normal temperature, most ionic ceramics are semiconductors e. is feasible to determine the charge carrier via a Hall effect experiment and carrier concentration and mobility, as well as type (e.g., electron or hole)
Which of these is right? a. Acceptor impurities introduce excess electrons. b. Donor contaminants cause more holes c. When there is a net spatial separation of positively charged particles, polarization is said to arise & on an atomic or molecular level, negatively charged substances d. At normal temperature, most ionic ceramics are semiconductors e. is feasible to determine the charge carrier via a Hall effect experiment and carrier concentration and mobility, as well as type (e.g., electron or hole)
Physical Chemistry
2nd Edition
ISBN:9781133958437
Author:Ball, David W. (david Warren), BAER, Tomas
Publisher:Ball, David W. (david Warren), BAER, Tomas
Chapter21: The Solid State: Crystals
Section: Chapter Questions
Problem 21.21E
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1.Which of these is right?
a. Acceptor impurities introduce excess electrons.
b. Donor contaminants cause more holes
c. When there is a net spatial separation of positively charged particles, polarization is said to arise & on an atomic or molecular level, negatively charged substances
d. At normal temperature, most ionic ceramics are semiconductors
e. is feasible to determine the charge carrier via a Hall effect experiment and carrier concentration and mobility, as well as type (e.g., electron or hole)
2. Whenever energy is absorbed as more than just a result of electron excitations, this happens, and afterward addressed as visible light.
I. phosphorescence
II. fluorescence
III. electroluminescence
IV. bioluminescence
V. luminescence
3. Internal scattering can cause translucency and opacity in the material except if; its anisotropic refractive indices in polycrystalline materials, its metallic alloys, or materials that have two phases, polymers with a high degree of crystalline structure, and microscopic pores in porous materials. Which one ?
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