Lecture 10 SSI 10 Pre Lecture

# Lecture 10 SSI 10 Pre Lecture - Physics7CSSI2010...

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Physics 7C SSI 2010: Lecture 10: Quantum  Mechanics

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Agenda Evaluations Quantum Mechanics Particles as Probability Waves Bound States and Probability Energy Levels and Spectroscopy Quiz 7
New Topic: Quantum  Mechanics As our first topic, we’ll have to talk again about light, which we just said was an electromagnetic wave… but it turns out we can also think of light as being made of particles Photons!

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Photons: Packets of Light Energy Photons are “particles” which actually make up a light wave Each photon has a given energy, the total energy of the wave is given by the sum of the energies of all the photons Color (frequency) of light is related to the photon energy: E = hf = energy of one photon with frequency f h = 6.626 x 10 -34 J·s is called Planck’s constant The intensity (brightness, which is related to total energy) of a light wave corresponds to the NUMBER of photons
Quantum Mechanics: The  Electromagnetic Spectrum Which type of EM radiation has the greatest energy per photon? 1) Radio 2) Infrared 3) Visible 4) UV 5) X-Ray

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Photons and the Double Slit:  Probability Waves In our double slit experiment, we found that constructive and destructive interference due to path length difference caused bright and dark spots
Photons and the Double Slit:  Probability Waves Now reduce the number of photons so that only one goes through the slit at a time. What happens? Each photon hits the screen at a seemingly

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## This note was uploaded on 08/21/2011 for the course PHYS 7c taught by Professor Coleman during the Summer '09 term at UC Davis.

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Lecture 10 SSI 10 Pre Lecture - Physics7CSSI2010...

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