STANDING WAVE ON CIRCULAR HOOP<br />
(10 of 12 - Variations Available)<br />
Analog - de Broglie Wavelengths & Bohr Orbits<br />
A circular hoop of wire is vibrated at a variable frequency. At a frequency of 89 Hz the standing wave is visible on the wire- analagous  to the de Broglie formula for the electron orbital and showing the wave-particle duality of matter.