Click here to read the pdf of Additional Material [November-2012] to be added to the 1st edition of the textbook:
Sine wave generation from Motion of a point around a circle
Sine Wave Generation from Circle
Motion of material in a Traveling wave
Traveling Wave – motion of material
Circular membrane – modes – web archive of applets
Circular Membrane Applet of modes
Tuning fork modes
Fundamental
Clang mode
Evolution of a General Excitation via Spectral Analysis -Vibrating String
GeneralExcitation Vibrating String
Video of a Bouncing Steel ball on a surface of Liquid Metal and on a surface of Titanium metal.
Liquid metal has the characteristic of being highly elastic and losing little energy in a collision.
It is incredible how many bounces a steel ball makes on a liquid metal surface before coming to apparent rest.
Notice how the time between consecutive bounces decreases — or, expressed differently, how the frequency of the bounces increases. To appreciate why this is so, take a look at the following problem.
Problem: If a ball is dropped from rest at a height of 30cm from the bottom of the column and each bounce leads to a new height that is 95% the previous height, how many bounces will it take for the ball to reach a height of only one Angstrom [10^(-10) m]? Atoms are on the order of a few Angstroms in diameter.
WAVE PHENOMENA in a RIPPLE TANK
Below there are links to private postings on YouTube produced using the beautiful applet on the website:
http://www.falstad.com/ripple/
If you look closely you will see how to control the applet
I recommend that you do some exploration on your own to enjoy a rich variety of wave phenomena.
I also highly recommend that you click on the full screen button to see the details.
SINGLE SOURCE in a Ripple Tank
Diffraction by a Half Plane (located at the far top right) in a Ripple Tank
Note how the diffraction depends upon the wavelength and therefore frequency.
Small Line Segment – Obstacle Diffracts a Wave in a Ripple Tank
DIFFRACTION by an Obstacle in a Ripple Tank
Look carefully to see my mouse pointer drawing the obstacle. You can draw your own obstacles.
EXCEL file of a table of color matching functions for sRGB primaries
Chromaticity Diagram for sRGB primaries
Recent Comments