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Physics Core/AP 1 and 2

Chapter 24: 6-12 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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Homework

Physics 24: 6-12 Diffraction and Interference

Homework

Reading Preparation

Text Reading: Giancoli, Physics - Principles with Applications, Chapter 24: Sections 6 to 12

Study Points

Key Equations

  • Diffraction grating principle maxima: sin   θ =   m λ d ,    m   =   0 ,   1 ,   2....  
  • Brewster's angle (polarization) tan   θ p = n

Web Lecture

Read the following weblecture before chat: Diffraction and Interference

Study Activity

Use the simulation below to explore diffraction.

  • Open the Introduction.
    • Turn on the spigot to drop water into the water tank.
    • View the wave dispersion from the top. What do you notice? What do you notice about the shape of the wave as it travels from the source?
    • View the wave dispersion from the side. What do you notice about the shape of the wave as it travels from the source?
    • Increase and decrease the frequence and amplitudes, and observe how wave shapes change. Use the graph to visualize wave "mapping".
    • Change the source to a sound wave and repeat your observations. How do sound waves differ from water waves? Use the graph, waves, and particles visualizations to help you understand how sound waves propagate.
    • Change the source to a laser repeat your observations. Use the graph and screen to help you understand how light waves propagate How do light waves differ from water waves? from sound waves?
  • Repeat your observations using the Interference button to see how each type of wave behaves when there are two sources.
  • Repeat your observations usiung the Slits button to see how each type of wave behaves on passing through a slit.

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!