Straight wave reflection from straight barriers, 80-231, approx 3 minutes
Single straight pulses are reflected from a straight barrier placed parallel to the wave front, then at 35, 45 and 55 degrees. At 35 and 45 degrees the action is stopped and the angles of incidence and reflection are shown. Angles are measured between the wave front and the barrier. [approx 1 minute 50 seconds].
A continuous periodic wave is reflected from the barrier placed at 45 degrees to the wave front. [approx 30 seconds].
Circular wave reflection from various barriers, 80-234, approx 2 minutes and 45 seconds
From the notes: "The film first shows that the wave velocity decreases as the wave crosses a boundary from deep to shallow water. When the periodic wave is incident at an angle on the boundary of the shallow region the wave fronts also bend, thereby changing the direction of propagation. Although most of the incident wave is refracted, part of it is reflected. [approx 50 seonds].
Then the situation is reversed. As the wave crosses the boundary from shallow to deep water the wave velocity increases; the wavelength is longer. The angle of incidence is increased until at a critical angle the refracted wave (in the deep water) runs just parallel to the boundary. [approx 1 minute].
With a further slight increase in the angle of incidence there is total reflection at the boundary." [approx 20 seconds].
Water depths are 0.8 inches and 0.08 inches.
Reflection of waves from concave barriers
Refraction of waves
Barrier penetration by waves
Bragg reflection of waves
Superposition of pulses
Effect of phase difference between sources
Single slit diffraction
Multiple slit diffraction
Diffraction and scattering around obstacles
Doppler effect [*****;W;1]
wave velocity 19 cm/sec, two passes of dipper with source velocity 7 cm/sec, and two with source velocity 14 cm/sec
Formation of shock waves
Interference of waves
Disclaimer: All demonstrations are posted for the convenience and benefit of faculty and staff in the Department of Physics at Simon Fraser University and are not intended for outside use. The author(s) assume no responsibility or liability for the use of information contained on this site. Warnings and precautionary measures listed on this site assume normal operation of equipment and are not inclusive. Demonstrations may pose a significant hazard and can, in some instances, result in death; reasonable safety precautions must be taken. Demonstrations should be performed by qualified individuals only.
Prepared by Jeff Rudd, 1999
Revised by Laura Schmidt, 2007
