1. Intro to Quantum Mechanics (phys 304)
Instructor: Prof. Marcel Franz
Textbook: “Introduction to QM” by D.J. Griffiths (second edition)
Lectures: Tu & Th, 9:30-11:15
Course webpage:

2. Particle-wave duality
What is this?
Young’s “double-slit” experiment
Interference: Light consists of WAWES

3. If light consisted of particles…

4. Light interference Path difference: Intensity maxima:
Intensity minima:

5. Now perform the same experiment with electrons
Experiment by A. Tonomura of Hitachi Corp., June 1999

6. Electrons: particles or waves?

7. What can we conclude about the electron from Tonomura experiment?
Electrons appear to have both
particle-like and wave-like properties!