2026知到答案 Characterization of Materials（西安交通大学） 最新智慧树满分章节测试答案

第二章 单元测试

1、单选题：
X-rays were discovered by （ ）.
选项：
A:Laue
B:Euler
C:Bragg
D:Rӧntgen
答案: 【Rӧntgen】

2、单选题：
A crystal lattice is best described as （ ）.
选项：
A:a physical layer of atoms with measurable mass
B:a geometric cell that must always have 90-degree internal angles
C:a small group of atoms that repeats infinitely in three dimensions
D:an infinite array of imaginary points in space where every point has identical surroundings
答案: 【an infinite array of imaginary points in space where every point has identical surroundings】

3、单选题：
Max von Laue's 1912 historic breakthrough was highly significant because his successful X-ray diffraction experiment simultaneously proved that （ ）.
选项：
A:X-rays are particles and crystal lattices are completely disordered
B:X-rays are high-energy particles and crystals have an amorphous structure
C:X-rays are electromagnetic waves with short wavelengths and crystals possess an ordered atomic arrangement
D:X-rays are harmless to human tissue and crystal lattice structures have physical mass
答案: 【X-rays are electromagnetic waves with short wavelengths and crystals possess an ordered atomic arrangement】

4、单选题：
In the mathematical framework of crystallography, if the volume of a real-space unit cell is V and its basis vectors are a, b, and c, how is the reciprocal basis vector a* defined? （ ）
选项：
A:a* = (a · b × c) / V
B:a* = (b × c) / V
C:a* = (a × b) / V
D:a* = (c × a) / V
答案: 【a* = (b × c) / V】

5、单选题：
During the interaction between an incoming X-ray beam and a single electron, which physical mechanism provides the coherent, elastic waves necessary for constructive interference in X-ray diffraction? （ ）
选项：
A:Photoabsorption
B:Thomson scattering
C:Thermal diffuse scattering
D:Compton scattering
答案: 【Thomson scattering】

6、单选题：
The atomic scattering factor f drops continuously below the atomic number Z as the scattering angle theta increases. What is the fundamental physical cause of this angular dependency? （ ）
选项：
A:The multiplicity factor shifts dynamically as the sample rotates through space.
B:High-angle X-rays are completely absorbed by the dense atomic nucleus.
C:Waves scattered by electrons from different sides of the spatial electron cloud undergo partial destructive interference.
D:The X-ray photon loses energy due to inelastic collisions with core protons.
答案: 【Waves scattered by electrons from different sides of the spatial electron cloud undergo partial destructive interference.】

7、单选题：
When measuring macrostresses via the sin^2(psi) method, why must the characteristic wavelength be optimized to produce a strong diffraction peak at a very high 2theta angle above 130 degrees? （ ）
选项：
A:High-angle peaks prevent iron-based steel samples from fluorescing heavily.
B:High-angle peaks are far more sensitive to minor changes in lattice spacing.
C:High-angle peaks completely eliminate inelastic Compton scattering background.
D:High-angle peaks force the Ewald sphere to contract its volumetric shell.
答案: 【High-angle peaks prevent iron-based steel samples from fluorescing heavily.】