Light as a Particle: Photoelectric Effect

The discovery of the temperature dependence of the spectrum of an incandescent light source and the discovery of the photoelectric effect led to the characterization of the particle-like properties of light. Here we demonstrate these two phenomena.
The Emission Spectrum of a Light Bulb as a Function of Temperature   
(Movie/Animation (1))
The Photoelectric Effect   
(Movie/Animation, Audio/Visual (3))
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