Atomic and Molecular Physics Important Questions

Bsc/Msc Physics 

 Part-1

Unit 1

1. Explain quantum states of one electron system?
2. Write short notes on Pauli's principle?
3. Explain the various series observed in Hydrogen spectra?
4. Explain the spectra of Alkali elements?
5. Explain the doublet character of spectral lines in the spectra of Alkali elements?
6. Write short notes on Atomic orbitals?
7. Define L-S and J-J coupling?
8. Define coupling and obtain the interaction energy in L-S and J-J coupling?
9. Describe Thomas Fermi statistical model?
10. Describe energy in Two Electron system (Helium Atom)?
11. Describe Spin orbit interaction in detail?
12. Find out Spin orbit interaction energy and explain doublet separation due to spin orbit interaction?
13. Write short notes on Hartree and Hartree fock method?
14. Write short notes on Hyperfine Structure and line broadening mechanisms?

Unit 2

1. What are the different types of molecules?
2. Explain diatomic linear, symmetric top , asymmetric top and spherical top molecules?
3. Explain non rigid rotator?
4. Explain the energy level and spectra of non rigid rotator?
5. Describe an expression for the rotational energy levels of a diatomic molecule taking it as a rigid rotator . Also discuss its spectra?
6. Describe rotational spectra of diatomic molecules as a rigid rotator?
7. Write short notes on the intensity of rotational lines?

Unit 3

1. Explain Morse potential energy curve?
2. Explain Vibrational energy of diatomic molecule?
3. Discuss PQR branches?
4. Describe Vibrational energy and spectra of a diatomic molecule as a simple harmonic oscillator?
5. Describe energy level and spectra of diatomic molecule as vibrating rotator?
6. Describe vibration spectrum of diatomic molecule?
7. Write short notes on IR spectrometer?

Unit 4

1. Explain the spectroscopic techniques for infra red spectra?
2. Explain quantum theory of Raman effect?
3. Explain the principle of Mossbauer spectroscopy?
4. What is Raman effect and its silent features. Disscus the experimental arrangement to study the Raman effect?
5. Discuss the Vibrational Raman spectra, Rotational Raman spectra and Vibrational—rotational Raman spectra?
6. Explain transitional rules of Vibrational rotational spectra?
7. Explain photoelectron spectroscopy?
8. Explain the spectroscopy techniques of visible and ultraviolet spectra?
9. Write short notes on photo—acoustic spectroscopy?

Part 2

Unit 1: NMR Spectroscopy 

1. What is NMR ( Nuclear Magnetic Resonance)?
2. Explain interaction between nuclear spin and magnetic field?
3. Explain population of energy level in NMR?
4. Write the concept of NMR Spectroscopy in detail with relaxation process?
5. Explain spin spin interaction and spin spin coupling between two and more Nuclei?

Unit 2: Electronic Spectra of Diatomic Molecules

1. Explain Born—Oppenheimer Approximation?
2. Explain Dissociation energy in electronic spectra?
3. Explain Vibrational course of electronic spectra with bands progression and sequence?
4. What are Dissociation and Pre Dissociation?
5. Write short notes on Vibrational course structure?
6. Explain Franck Condon principle in detail?

Unit 3: Raman Spectra 

1. Explain quantum theory of Raman effect?
2. What is Raman effect and its silent features. Disscus the experimental arrangement to study the Raman effect?
3. Discuss the Vibrational Raman spectra, Rotational Raman spectra and Vibrational—rotational Raman spectra of Diatomic molecule?
4. Write the application of Raman spectra?
5. Explain Molecular polarisability in Raman effect?
6. Write the application of infrared spectroscopy in structure determination?

Unit 4: Mossbauer Spectroscopy

1. Explain the principle of Mossbauer spectroscopy?
2. What is Mossbauer effect?
3. Explain Line width and resonance absorption in Mossbauer spectroscopy?
4. Explain Isomerism Shift?
5. Explain Quadra pole splitting  Magnetic Field effect?
6. What is recoil less gamma emission?

Unit 5: ESR Spectroscopy 

1. Explain ESR Spectrometer?
2. What is G—value in ESR?
3. Explain the Principle of ESR. Give Simple Experimental setup of ESR?
4. Describe splitting of electron energy levels by magnetic field?
5. Explain ESR Spectra of free radicals in solution?