Video Lectures for Physics 225
# Physics 225 Lecture Videos

## Topic 1: Harbingers of New Physics

Total time: 1:41

Blackbody Radiation, part 2 (0:53)

The Photoelectric Effect (0:48)

## Topic 2: Introduction to Special Relativity

Total time: 5:00

Introduction to Special Relativity (0:48)

Einstein's Postulates, part 1 (0:51)

(*These next two recordings are parts of a single lecture; there was a technical problem about 15 minutes into the lecture.*)

Einstein's Postulates, part 2a (0:15)

Einstein's Postulates, part 2b (0:28)

Some Consequences of Einstein's Postulates, part 1 (0:52)

Some Consequences of Einstein's Postulates, part 2 (0:51)

Some Consequences of Einstein's Postulates, part 3 (0:55)

## Topic 3: The Lorentz Transformations

Total time: 6:25

The Lorentz Transformations, part 1 (0:51)

The Lorentz Transformations, part 2 (0:45)

Rotation Matrices (0:53)

Lorentz Transformation Matrices (0:50)

The Spacetime Interval (0:53)

Relativistic Kinematics, part 1 (0:51)

Relativistic Kinematics, part 2 (0:54)

Example: Conservation of 4-Momentum; 2 protons to 4 (0:25)

## Topic 4: Introduction to Quantum Mechanics

Total time: 2:51

A Pseudo-Derivation of Schrodinger's Equation (0:45)

Uncertainty and the Meaning of the Wave Function (0:55)

Solving Schrodinger's Equation (0:51)

## Topic 5: Some Potentials *V*(*x*)

Total time: 4:04

The Infinite Square Well, part 1 (0:45)

The Infinite Square Well, part 2 (0:55)

The Harmonic Oscillator Potential, part 1 (0:52)

The Harmonic Oscillator Potential, part 2 (0:41)

The Harmonic Oscillator Potential, part 3 (0:51)

## Topic 6: Operators and Expectation Values

Total time: 5:09

Example: Calculating the Basis Coefficients for the Infinite Square Well (0:45)

Probability and Quantum Mechanics, part 1 (0:50)

Probability and Quantum Mechanics, part 2 (0:56)

Expectation Values and Operators (0:50)

The Basic Postulates of Quantum Mechanics (0:55)

Relating the Postulates to Familiar Mathematics, part 1 (0:53)

Relating the Postulates to Familiar Mathematics, part 2 (0:53)

## Topic 7: The Uncertainty Principle

Total time: 2:22

Expectation Values and Operators (0:50)

The Uncertainty Principle, part 1 (0:46)

The Uncertainty Principle, part 2 (0:46)

The Uncertainty Principle, part 3 (0:48)

The Uncertainty Principle, part 4 (0:50)

The Uncertainty Principle, part 5 (0:52)

## Topic 8: Schrodinger's Equation in 3-d

Total time: 2:22

Review of the Del Operator (0:52)

The Infinite 3d Well, part 1 (0:50)

The Infinite 3d Well, part 2 (0:55)

## Topic 9: The Hydrogen Atom

Total time: 3:28

Solving Schrodinger's Equation: The Azimuthal Function (0:48)

Solving Schrodinger's Equation: The Polar Function (0:52)

Solving Schrodinger's Equation: The Radial Function (0:54)

Solving Schrodinger's Equation: The Full Solution (0:54)

Orbital Angular Momentum (L), part 1 (0:54)

Orbital Angular Momentum (L), part 2 (0:54)

## Topic 10: Electron Spin

Total time: 3:31

Spin, part 1 (0:53)

Spin, part 2 (0:50)

Spin, part 3 (0:55)

Spin, part 4 (0:55)