41 PhysicsAsWeKnowIt

41 PhysicsAsWeKnowIt - Announcements Invitation to add...

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9/20/11 Craig Ogilvie 11 Announcements § Invitation to add physics minor (or major) 20 credits required for physics minor Half-way there! Contact me at cogilvie@iastate.edu § Two surveys Approaches to physics: Learning module, extra credit ClassClimate course evaluation § May 2 Final, 4;30 to 6:30pm, rooms posted on webCT Single 11”by13” piece of paper for the final § Reviews
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9/20/11 Craig Ogilvie 22 2 Summary Lecture 40 § Schrodinger equation determines the shapes/extent of y(r,q,f) § First term corresponds to kinetic energy § high curvature of wavefunction => short wavelength => high p § Second term is potential energy § Example, infinite potential well ) ( ) ( ) ( 2 2 2 2 x E x x U dx d m ψ = + - U(x) x 0 L 0 ) ( ) 0 ( = = = = L x x number quantum n, by labeled energies discrete 2 2 2 2 2 mL n E n E π =
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9/20/11 Craig Ogilvie 33 Physics as we currently know it: Goals § Understand current view of forces § Understand likely origin of mass Be able to follow news articles about discoveries in fundamental physics § (80 years in 40 min:)
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Craig Ogilvie 44 Creating fields § Fields can be created/destroyed § Prior examples Move a charge => create a B-field § Change current => change B-field => induce E-field Create traveling E/B field (light)
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41 PhysicsAsWeKnowIt - Announcements Invitation to add...

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