Aluminum/Uranium and SF6/Air/Helium density comparisons.
The concept of mass per unit volume, aka density, is shown by having several different substances on hand for comparison. In solid materials, we have equal size chunks1 of aluminum (2...
Fifteen uncoupled simple pendulums of monotonically increasing lengths dance together to produce visual traveling waves, standing waves, beating, and random motion. One might call this kinetic art and the choreography of the dance of the...
A physical pendulum finds stability in its inverted position when driven at the proper frequency and amplitude combination.
The physical pendulum is a 45 cm x 2 cm x 6 mm (1/4") strip mounted on a ball-bearing pivot and can rotate 360 degrees...
A photon (modeled by a bouncing ping-pong ball) is observed from two reference frames and provides the motivation for time dilation.
Video of our demo in action https://youtu.be/c6m6pCROEf8
Assembly of three gas discharge tubes and white light source for spectral analysis with diffraction gratings.
3 cm microwaves and prisms made of plastic beads demonstrate total internal reflection in one prism, and coupling of the evanescent wave to a second prism. An audio signal corresponds to the one kiloHertz modulation of the microwaves.
The prisms are made...
The thermal radiation emitted from a black body is temperature dependant. The tungsten filament of a bulb approximates a black body, and by increasing the current through the bulb, its temperature rises and so its color spectrum shifts to...
An accelerated electric charge radiates energy. So according to classical physics, an electron in orbit about an atomic nucleus should emit electromagnetic radiation by virtue of its orbital motion. As it radiates energy, the radius of its...
In the Heisenberg uncertainty relation, the momentum of a particle cannot be known with any greater accuracy than h/∆x where h is Planck's constant and ∆x is the uncertainty in spatial position. The more you localize its spatial position...
