This document discusses the wave-particle duality of light. It describes early theories that light was either a wave (wave theory) or particle (particle theory). Later, Max Planck and Albert Einstein provided evidence that light exhibits both wave-like and particle-like properties. The photoelectric effect and double slit experiment showed that light behaves as particles in some cases and waves in others, demonstrating its dual nature.

1. By: Andrew Disharoon, Nathan Robertson, Nigel Long, Brandon Huggins Duality Of light

6. This explains the wave-particle duality

7. Stating that light acts like waves in propagation, interference, and diffraction

8. But like particles when reacting with matter

9. Because of Planck quantum mechanics was createdParticle Theory Continued… http://physics.tamuk.edu/~suson/html/4323/intro.html

12. As the front of the wave passes over an object, the wavelets following curve around the object.

13. This is why the edge of the shadow is not sharp and precise.Diffraction

14. Light Diffraction experiment Fuzzy outline of shadow Diffraction

21. To test this, Philip Lenard did an experiment with the Photoelectric Effect.

25. The photons could be interacting like particles in a wave. Double Slit Experiment

26. Single Photon

27. Double Slit Experiment There can’t be any interference from the other photons so it should not make a wave pattern but it does.