PHY 111, Spring, 2006

Week 6

 

  Main Objectives
bulletYou should be able to calculate the amount of energy carried by a photon given its wavelength. 
bulletYou should be able to discuss in detail the process by which an electron changing energy levels produces emission and absorption spectra including why the spectra of each atom is unique
bulletYou should be able explain what the Doppler effect is and what it can help us learn about stars from their spectra
bulletBe able to use the inverse square law of light to compare the intensity of light sources

Plus lots of objectives that were on Week 5, but we didn't get to them last week.
Tuesday Go over exam.  Introduction to waves.  Discussion of different kinds of electromagnetic waves. Discuss two models of the emission and absorption of light: blackbodies and spectra   

Outside of class: Read Chapter 4 Sec. 5-8.  Look over the multiple choice questions on your exam and be prepared to ask questions on Thursday about any you don't understand.   Read handout on energy concepts.  Complete Ch. 4 Questions to Ponder 8 and Calculations 1, 6, and 12 to be turned in on Thursday.
Thursday Group work on blackbody spectra.  Discussion of how emission and absorption spectra are created.  Discussion of how the Doppler effect can change spectra.

Outside of class: Read Chapter 5 Sec. 1-4. Do Ch. 4 Recall Questions 1-23 odd numbers only to be turned in Thursday of next week.