实验   原子与核物理

•  Linear propagation of cathode rays / of electron beams •  Electrostatic charging effects •  Electron deflection by a magnetic field Straight-line propagation of electrons in the absence ... 更多

•  Introduction to electron optics Cathode rays and deflecting fields can be used to magnify shadow images in a manner analogous to an optical lens system. With the help of this supplement, the experiment: Maltese-Cross ... 更多

•  Observing the thermionic emission of charge-carriers from a heated cathode. •  Determining the polarity of the emitted charge-carriers. •  Estimating the specific charge (chargeto-mass ratio ... 更多

•  Investigate the deflection of an electron beam by a magnetic field. •  Investigate the deflection of an electron beam by an electric field. •  Construct a velocity filter using orthogonal electric ... 更多

Electrons in a fine-beam tube are deflected into a circular path by a uniform magnetic field. The tube contains neon gas at a precisely defined pressure so that gas atoms become ionised by collision with electrons along the path thus ... 更多

Objective: Determine Planck’s constant using the decelerating voltage method In a modified version of a classic set-up, light of known frequency passes through a ring-shaped anode to collide with a cathode, where it causes electrons ... 更多

Objective: Carry out Millikan’s experiment to onfirm the value of the elementary charge with the help of charged oil drops Between the years 1910 and 1913, Robert Andrews Millikan managed to measure the elementary electric charge ... 更多

Objective: Observe the diffraction of electrons on polycrystalline graphite and confirm the wave nature of electrons The diffraction of electrons on a polycrystalline graphite foil provides evidence for the wave nature of electrons. ... 更多

目的：记录和解释巴尔默系列氢谱线在可见光区的谱线。 发光原子的线光谱是每个特定化学元素的唯一特征，尽管它们对于原子序数较高的元素变得越来越复杂。相比之下，位于可见区域内的氢原子谱线的一部分可以简单地基于原子的玻尔模型来解释。 另外推荐：补充ue5020100s 更多

Objective: Record and interpret the Balmer series of lines for hydrogen other line spectra in the visible region The line spectra of light-emitting atoms are uniquely characteristic for each specific chemical element, although they become ... 更多

Objective: Carry out high-precision measurements of absorption and emission lines The resolution of a spectrometer is often assessed in terms of whether the two sodium D-lines can be distinguished. This experiment uses a digital spectrometer ... 更多

•  Record and evaluate the Franck-Hertz curve for neon and observe emission of light. •  Compare the distribution of current maxima with the excitation energies of neon atoms. •  Observe the light ... 更多

•  Measure the collector current IR as a function of the accelerating voltage UA. •  Compare the positions of the current maxima with the known critical potentials of the helium atom. •  Identify ... 更多

Objective: Demonstrate electron spin resonance in DPPH Electron spin resonance (ESR) is based on the energy absorption by substances with unpaired electrons, which are inside an external magnetic field produced by a DC source. The energy ... 更多

Objective: Demonstrate and compare nuclear magnetic resonance in glycerine, polystyrene and Teflon Nuclear magnetic resonance (NMR) is based on the energy absorption by substances with nuclear magnetism, which are inside an external ... 更多