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Unformatted text preview: Particle-Like Behavior of Light At this point you may think that it's pretty obvious that light behaves like a wave. But where's the proof that light is really composed of particles called photons? The proof comes from an experiment that is called the photoelectric effect. An important feature of this experiment is that the electron is emitted from the metal with a specific kinetic energy ( i.e. a specific speed). Now anyone who is familiar with the behavior of waves knows that the energy associated with a wave is related to its amplitude or intensity. For example, at the ocean the bigger the wave, the higher the energy associated with the wave. It's not the small waves that knock you over it's the big waves! So everyone who thought light is just a wave was really confused when the intensity of the light was increased (brighter light) and the kinetic energy of the...
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