We have designed and built our own cosmic ray telescope (a.k.a. spark chamber). Unlike the old one, this one works reliably, is larger, and makes for a great demo.
In the 1960's and '70s, spark chambers were commonly used as detectors in particle physics...
Observe the decay of airborne radionuclides with a Geiger counter and computer. (OK, it's not new since we've been doing the experiment for 20 years...we just neglected adding it to our list.)
The experiment addresses questions like "Does color inhere in the world, or in the eye?" It is a re-creation of Edwin Land's retinex theory experiment.
What It Shows
Color is not actually a property of light or of objects that reflect light; it is a...
Simple RL and RC circuits serve as high-pass and low-pass audio frequency filters.
What it shows:
Simple RL and RC circuits act as a passive high-pass and low-pass audio frequency filters. Their effect is clearly evident when listening to music (or white...
10 cm microwaves are used for the demonstration of travelling and standing waves, reflection, interference, refraction, diffraction, absorption, polarization, tunneling, and waveguides.
What it shows:
The following is a sequence of experiments that can...
A 60 Hz AC magnetic flux from an iron core induces an emf in a suspended coil of wire. With appropriate capacitance added, the coil will be attracted to, repelled from, or not affected by the magnetic flux.
