2021智慧树答案 原子物理 知到网课章节测试答案

1、第 页2021智慧树答案 原子物理 知到网课章节测试答案 第二章 章节测试第八章 章节测试 1、选择题:Liquid helium (atomic weight 4.003) has a density r= 0.13 g/cm3. Estimate the radius of a He atom, assuming that the atoms are packed in the densest possible configuration, which fills 74% of the space. ( ) 选项：A:1.3 nmB:0.5 nmC:134.7 nmD:20.8 nm答案:

2、 【20.8 nm】 2、选择题:Through what angle is a 4 MeV a particle scattered when it approaches a gold nucleus with a impact parameter of 2.6 X 10-13 m? ( ) 选项：A:12.49oB:24.98oC:6.25oD:49.96o答案: 【12.49o】 3、选择题:The energy of a hydrogen atom in the first excited state is ( )选项：A:-0.85 eVB:-13.6 eVC:-3.4 eVD:-1

3、.51 eV答案: 【-3.4 eV】 4、选择题:On which of the following states of hydrogen the spin-orbit interaction has no effect? ( ) 选项：A:p stateB:s stateC:f stateD:d state答案: 【s state】 5、选择题:How large is the magnetic field generated by the electron in the ground state of a hydrogen atom, at the position of the pro

4、ton if it would circulate according to Bohr model on the shell n = 1? ( ) 选项：A:6.27 TB:7.98 TC:3.11 TD:12.54 T答案: 【12.54 T】 6、选择题:The Lande factor of 4D1/2 state is ( ) 选项：A:1.5B:0C:2D:3答案: 【0】 7、选择题:The angle between the total and the orbital angular momenta in a 4D3/2 state is ( ) 选项：A:101.54oB:30

5、oC:25.38oD:50.77o答案: 【50.77o】 8、选择题:How many lines can be expected for the 32D-32P transition in sodium? ( ) 选项：A:1B:5C:3D:2答案: 【3】 9、选择题:The de Broglie wavelength of an electron with kinetic energy of 100 keV is ( ) 选项：A:3.702 nmB:3.702 pmC:3.702 fmD:3.702 mm答案: 【3.702 pm】 10、选择题:The work function for the photoelectric effect in potassium is 2.25 eV. For the case when light with a wavelength of 3.6 x 10-7 m falls on the potassium, the velocity of the fastest of the emitted e