From Physlab.lums.edu.pk

Instructor: Dr. [Sabieh Anwar] *Office hours:* Monday, (11:15 am to 1:30 pm).

Teaching Fellows: [Mudassir Moosa] *Office hours:* Tuesday, Thursday (2:00 pm to 4:00 pm) and [Unab Javed] *Office hours:* Tuesday, Thursday (3:15 pm to 5:15 pm)

Textbooks: *Quantum Physics of Atoms, Molecules, Solids, Nuclei and Particles* by R. Eisberg and R. Resnick. (The book is available in the local market as a low priced edition.); *Modern Physics* by R.A. Serway, C.J. Moses and C.A. Moyer (also available in low priced edition.)

Click here for the course outline.

Here is the weblink for the same course I taught in Fall 2009. You will find homeworks, exams and their solutions from the 2009 offering of this course here, all in a consolidated pdf. Errors and omissions are expected.

**Week 1**

- The most important experiment in physics: double slit interference
- Blackbody radiation
- Stefan's and Wien's displacement law
- Rayleigh-Jeans formula

What is the most important experiment in physics: Part A | Part B | Part C

**Week 2**

- Plank's quantum hypothesis
- Radiation as photon gas
- The photoelectric effect

Blackbody radiation: Part A | Part B | Part C

Photoelectric effect

**Homework No. 1**

Blackbody radiation and photoelectric effect

**Week 3**

- Compton scattering
- A glimpse into the history of science at the turn of the nineteenth century
- Investigating the particle nature of matter: Faraday's electrolysis, Thomson's discovery of the electron and determination of its e/m, Rutherford's discovery of the nucleus
- Recitation session Sept. 30, 2011.

Compton scattering: Part A | Part B

Particle nature of matter, Rutherford scattering: Part A | Part B|Part C

**Homework No. 2**

Compton scattering

**Week 4**

- Bohr's quantization
- Lasers
- Introduction to matter waves and wave particle duality

Bohr's quantization

Laser fundamentals

Beats

**Week 5**

- Phase and group velocities
- Normal, anomalous dispersion | Java applets demonstrating dispersion
- Fourier integrals
- Constructing wave packets (corresponding to matter waves)
- Uncertainty principle

Phase and group velocity, dispersion

Constructing packets of matter waves

Uncertainty principle

**Homework No. 3**

Bohr's model and laser fundamentals

**Week 6**

- Uncertainty principle Continued
- Applications of uncertainty principle
- Wave equations in classical and quantum mechanics
- Schrodinger wave equation and its solution

Applications of uncertainty principle

Wave equations in classical and quantum mechanics

Schrodinger wave equation: Part A | Part B

**Quiz No. 2**

Uncertainty principle

**Week 7**

- Wavefunction and its probabilistic interpretation
- Particle in a finite well
- Infinite square well and its applications
- Finite well and its application
- Barrier potential and quantum tunneling
- Recitation session Oct. 28, 2011.

Particle in a box

Finite well and quantum tunneling

**Homework No. 4**

Schrodinger wave equation and potential wells

**Week 8**

- Quantum tunneling revisited
- Transmission and Reflection coefficients
- Applications of quantum tunneling
- Radioactive decay: a quantum tunneling problem
- Tunneling calculator
- Scanning tunneling microscope
- Recitation session Nov. 4, 2011.

Quantum tunneling revisited

Radioactive decay: a quantum tunneling problem

Problem solving session on quantum tunneling

**Week 9**

- Eid Holidays
- Recitation session Nov. 11, 2011.

**Week 10**

Review session I

Review session II

**Midterm examanination**

Question paper

Solution set for the midterm exam

**Week 11**

- Three dimensional well, degeneracy
- Schrodinger equation for the H atom:
- Orbitals: 3D H atom orbital viewer

Three dimensional infinite well and degeneracy

Towards the hydrogen atom

**Week 12**

- Plotting orbitals
- radial probability density
- atomic transitions and spectra
- angular momentum
- Three review questions on the hydrogen atom

Atomic orbitals (angular part)

Radial probability density

**Homework No. 5**

Hydrogen Atom

**Week 12**

- Spins
- Stern-Gerlach experiment
- Some applications of the spin phenomena
- The bad cigar that helped reorient atomic physics; article from Physics Today

Stern-Gerlach Experiment

Applications of the spin phenomena and interpreting results from the Stern-Gerlach experiment

**Quiz No. 3**

Hydrogen atoms

**Week 13**

- Magnetic resonance
- Pauli exclusion principle
- Energy Bands
- Comparison of classical and quantum conduction
- Recitation session December 15, 2011, including review problems on spin.

Magnetic resonance

Introduction to energy bands

Conduction mechanisms; meaning of the Pauli exclusion principle

**Week 14 and 15**

- Semiconductors: energy bands, intrinsic and extrinsic
- Working of the pn junction
- Calculating Fermi energies, density of states
- Fermi-Dirac distribution
- Here is some material that you must read on your own; it will help you understand semiconductors better and will enable you to solve HW 6 given below. The excerpt is from Ch 43 of "Physics for Scientists and Engineers" by Fishbane, Thornton and Gasiorowicz.
- Reading material on the Physics of Stars, Ch. 44, Physics by Gettys, Keller and Stoves.
- Recitation session December 23, 2011, calculations related to the Fermi energy and density of states.
- Some review problems, based on energy bands and star physics. These problems will be reviewed by Mr. Muddassir Moosa on Thursday, 29 December 2011

Semiconductors

Foundational treatment of the PN junction, Invited Lecture by Professor Asad Abidi

Calculating the Fermi energy

From diodes to stars (a primer on star physics)

**Homework No. 6**

Semiconductors