O Phyical chomitayI Chapter I Introduction of Quantum Meelanics Comptons effect, walel uize in 1927 - investigated the scattering of monochromatic x- ray and found that the scattered beam consisted of radiation of two different wavelengths, one wavelength was the same as for original beam, whereas the other was slightly longer 20218/21 Chemistry Departme nt of Fudan University
Physical ChemistryI Chapter I Introduction of Quantum Mechanics 2021/8/21 Chemistry Department of Fudan University 21 Compton’s effect, Nobel Prize in 1927 ——investigated the scattering of monochromatic xray and found that the scattered beam consisted of radiation of two different wavelengths, one wavelength was the same as for original beam, whereas the other was slightly longer
O Phyical chomitayI Chapter I Introduction of Quantum Meelanics Proble The work function ofK is 2. 2ev and that of Ni is 5.0e a Calculate the thresholdfrequencies and wavelengths for these two metals. b)will violet light of wavelength 4000A cause the photoelectric effect in K? In Ni? c Calculate the maximum kinetic energy ofthe electron emitted in b) 20218/21 Chemistry Departme nt of Fudan University
Physical ChemistryI Chapter I Introduction of Quantum Mechanics 2021/8/21 Chemistry Department of Fudan University 22 Problem: The work function of K is 2.2eV and that of Ni is 5.0eV. a) Calculate the threshold frequencies and wavelengths for these two metals. b) Will violet light of wavelength 4000Åcause the photoelectric effect in K? In Ni? c) Calculate the maximum kinetic energy of the electron emitted in b)
O Phyical chomitayI Chapter I Introduction of Quantum Meelanics Bohr's Atomic Theory G Heated hydrogen 6563A 4861 4341A4102A red green violet What is the regularities in atomic spectra 20218/21 Chemistry Departme nt of Fudan University
Physical ChemistryI Chapter I Introduction of Quantum Mechanics 2021/8/21 Chemistry Department of Fudan University 23 Bohr’s Atomic Theory What is the regularities in atomic spectra
O Phyical chomitayI Chapter I Introduction of Quantum Meelanics Some empirical relationships 4 n g.y.Balmer sexies g..Rydleug'o sevies How to explain these rules The Model of atomic structure 20218/21 Chemistry Departme nt of Fudan University
Physical ChemistryI Chapter I Introduction of Quantum Mechanics 2021/8/21 Chemistry Department of Fudan University 24 = − 2 1 4 ~ ~ 1 n R J.J.Balmer’s series = − 2 2 2 1 ~ ~ 1 1 n n R J.R.Rydberg’s series How to explain these rules？ --------The Model of Atomic Structure Some empirical relationships:
O Phyical chomitayI Chapter I Introduction of Quantum Meelanics Thomson 's model 感 J.J. Tomson pudding model 20218/21 Chemistry Departme nt of Fudan University
Physical ChemistryI Chapter I Introduction of Quantum Mechanics 2021/8/21 Chemistry Department of Fudan University 25 J.J.Tomson J.J.Thomson’s Model pudding model