1. Light - Wave or Particle
Isaac Newton ( )
Christiaan Huygens (1629 – 1695)
Proponent of Light Particles
Proponent of Light Waves

2. Key Properties of Wave Behavior
Interference
Diffraction

3. Young’s Double Slit Experiment

4. Wave Nature of Light

5. Spectrum of White Light

6. Electromagnetic Spectrum

7. Photoelectric Effect

9. Einstein
Millikan

10. Double Slit Experiment Revisited

11. Atomic Spectra
Hydrogen
Helium
Neon
Mercury

12. Hydrogen Emission Spectrum

13. Hydrogen Spectrum

14. Bohr Model of Hydrogen
Niels Bohr (1885 – 1962)