Animation of transverse waves:

1. Animation of transverse waves: http://phet.colorado.edu/sims/wave-on-a-string/wave-on-a-string_en.html USE IE as browser.

2. Wave Function S Shape the same at some later time. t0 t1 t2 t3 t4 V→ X position x’ x General Wave Function

3. When waves collide Animation of transverse waves: http://phet.colorado.edu/sims/wave-on-a-string/wave-on-a-string_en.html USE IE as browser. Perform animation with low tension (so speed of waves is low) and put too pulses of wave separated by some time. What happens when waves overlap after reflection?

4. In phase, out of phase, partially out of phase waves Out of phase In phase Partially out of Phase

5. Electric fields as Phasors (similar to E field as phasors in Phys 121)

6. When waves collide – Superposition of waves Animation of transverse waves: http://phet.colorado.edu/sims/wave-on-a-string/wave-on-a-string_en.html USE IE as browser. Perform animation with normal tension, but oscillate the one end. Reflected waves form a standing wave with incoming wave.

7. When waves collide – Superposition of waves http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=19 Illustrates principle of Superposition Illustrates standing waves Illustrates “beats” Illustrates effect of phase difference between the waves Illustrates effect of waves of different amplitudes Illustrates concept of # of wavelengths in optical path length.

9. Beat Wave

10. Group Velocity