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Physics Core/AP 1 and 2

Chapter 27: 1-6 Assignment

Course Materials are always under revision! Weblecture content may change anytime prior to two weeks before scheduled chat session for content.

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Physics 27: 1-6 Early Quantum Mechanics


Reading Preparation

Text Reading: Giancoli, Physics - Principles with Applications, Chapter 27: Sections 1 to 6

Study Points

Key Equations

Electron charge to mass ratio e m   =   v Br Particles of mass m with electrical charge e will have a velocity v on a circular orbital path of radius r when passing through a magnetic field of B.
Wien's law λ max   =   2.90     10 3   mK T The wavelength at which the most radiation occurs depends on the absolute temperature of the blackbody
Planck's Energy E   =   h ν   =   h λ c

Web Lecture

Read the following weblecture before chat: Early Quantum Mechanics

Study Activity

Use the Blackbody simulation below to explore what happens when you change the temperature of your blackbody.

  • You can change the vertical scale by clicking on the Zoom/Unzoom magnifying glasses in the upper left. You can change the horizontal scale by clicking on the Zoom/Unzoom magnifying glasses in the lower right. [You may need to scale the intensity way down and the wavelength way up to see the wave function at low temperatures!]
  • Change the temperature. At which wavelength does maximum intensity occur for the Earth (construed as a black body)? for your kitchen oven? For the filament of a lightbulb? For the sun? for a Type A bright star (9000K)?
  • What color does each object appear?

Physics simulation Java Applets are the product of the PHET Interactive Simulations project at the University of Colorado, Boulder.

Chat Preparation Activities

Chapter Quiz

Lab Work

If you want lab credit for this course, you must complete at least 12 labs (honors course) or 18 labs (AP students). One or more lab exercises are posted for each chapter as part of the homework assignment. We will be reviewing lab work at regular intervals, so do not get behind!