P219lecture22lightparticles - Goal To understand how light...

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Goal: To understand how light acts like a particle Objectives: 1) To learn about Quantization 2) To understand Blackbody radiation 3) To learn more about The photon 4) To learn about the Photoelectric Effect
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Quantization Okay this is an ugly looking word. All it means is that energy is restricted to specific values. Think of a staircase. Each stair has a difference potential energy. However, you are only allowed to have the potential energies that are on the stairs. Any potential energy between two stairs is not allowed.
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Blackbody Spectrum – continuous All objects which absorb most of the light which passes through them emit energy as a “blackbody”. The shape of the blackbody spectrum is always the same. The strength of the spectrum (i.e. how much light it emits) and the peak wavelength of the spectrum depend on the temperature of the object.
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The photon A single light “particle” is called a photon.
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