Lecture 10 - Thursday, 9 February 2012

Chapter 8 - Section 8.6

Chapter 9 - Sections 9.1, 9.2, 9.3

• Electromagnetism
• Waves
• Interference of waves
• Light: particle or wave?
• The double slit experiment

Powerpoint Slides

Note: These slides do not include all material presented in class - additional material was presented on the blackboard and in demonstrations.

PDF Format - 1 slide per page

PDF Format - 6 slides per page

Supplementary Material

Today's demonstrations:
(i) Faraday's Law - generating a current by moving a magnet in and out of a wire loop;
(ii) Faraday's Law - lighting a lightbulb by moving a wire in a magnetic field;
(iii) Waves in a slinky and a skipping rope;
(iv) A wave of flames generated by compression of propane gas due to propagation of a sound wave in a tube;
(v) Transverse waves with the Bell wave machine (the one with the moving rods);
(vi) Longitudinal waves in the suspended slinky;
(vii) Illuminated standing wave machine;
(viii) Water waves and interference in the ripple tank;
(ix) Interference in overlaid transparencies;
(x) Young's double slit experiment with a green laser.

Today's animations:
Because we did a lot of demonstrations in today's class, I did not show most of these animations. I encourage you to try them out.

• A series of animations leading to Faraday's Law - try all five! http://phet.colorado.edu/simulations/sims.php?sim=Faradays_Electromagnetic_Lab

• Another animation of Faraday's Law: http://www.magnet.fsu.edu/education/tutorials/java/electromagneticinduction/index.html

• Transverse and longitudinal waves: http://einstein.byu.edu/~masong/HTMstuff/WaveTrans.html

• Transverse and longitudinal waves: http://paws.kettering.edu/~drussell/Demos/waves/wavemotion.html

• Explanations and illustrations of the parts of a wave: http://id.mind.net/~zona/mstm/physics/waves/partsOfAWave/waveParts.htm

• Constructive interference of two waves: http://www2.biglobe.ne.jp/~norimari/science/JavaEd/e-wave2.html

• Destructive interference of two waves: http://www2.biglobe.ne.jp/~norimari/science/JavaEd/e-wave3.html

• Several examples and explanations of wave interference: http://id.mind.net/~zona/mstm/physics/waves/interference/intrfrnc.html

• Two-source interference pattern: http://id.mind.net/~zona/mstm/physics/waves/interference/twoSource/TwoSourceInterference1.html

• Young's two-slit experiment with laser light: http://www.colorado.edu/physics/2000/applets/twoslitsa.html

• Double Slit interactive experiment - this takes a few minutes to load but is worth trying out - shows water, sound, and light: http://phet.colorado.edu/simulations/sims.php?sim=Wave_Interference

• Vary wavelength and slit separation in the two-slit experiment: http://dev.physicslab.org/asp/applets/doubleslit/default.asp

• Interactive ripple tank animation (the way it should look!): http://www.falstad.com/ripple/ex-2slit.html

The arrows let you jump to the previous or next class summaries (when posted).

This web site is maintained by Kimberly Strong.
Last updated February 9, 2012.