Standing sound waves in a glass pipe are made evident by the fountains of kerosene inside the pipe.
The air inside a very large glass pipe (partially filled with a fluid) is acoustically excited into a standing wave. Once resonating, the...
10 cm microwaves are used for the demonstration of travelling and standing waves, reflection, interference, refraction, diffraction, absorption, polarization, tunneling, and waveguides.
The following is a sequence of experiments that can...
Sound pressure level of a fire bell decreases by 6dB when distance is doubled.
The intensity of sound waves emanating from a point source changes inversely as the square of the distance from the source (for an example using visible light...
A large square metal plate, supported and harmonically driven at its center, is made to vibrate in any one of its numerous normal modes of vibration. As with the regular Chladni Plates, the two-dimensional standing wave patterns are made...
A 1.5m length of string driven at one end and fixed at the other shows standing waves for various driving frequencies.
The fundamental is the most dramatically visible state (usually around 15Hz). It's possible to show up to 8 nodes clearly-...
Waves reflecting from two surfaces can interfere constructively and destructively. In this case it is light waves that are being reflected from the front and rear surfaces of thin soap or oil films. The interference produces a pattern of...
Optical technique that allows us to see small changes in the refractivity of air and other transparent media.
Refraction due to inhomogeneity in air is made visible by our single-mirror schlieren optics setup. The refraction can be caused...
Oscillation of mass on wire in torsional mode of oscillation.
The frequency of oscillation of a torsional pendulum is proportional to the square root of the torsional constant and inversely proportional to the square root of the rotational...
Accumulation of sand at nodes of vibrating plate reveals resonance patterns.
A Chladni plate consists of a flat sheet of metal, usually circular or square, mounted on a central stalk to a sturdy base. When the plate is oscillating in a...
