Modern version of J.J. Thomson’s experiment
J.J. Thomson discovered the electron in 1897, while working with cathode ray tubes. We can scavenge a tube from an
Energy quantization
Some interesting and informative demonstrations are prepared as a useful teaching tool to explain the idea of energy quantization. One
Franck-Hertz experiment
Franck-Hertz experiment is a profound way of looking at the quantization of energy lev
els in an atom. A triode
Excitation by electric fields
Electrons inside atoms can be excited not only by striking photons or electrons, but also by electric fields. The electric
Phonon modes in a linear lattice
This demonstration is specifically based upon the properties of phonons. A diatomic chain with well defined periodicity is used as
Close packing of atoms
Table tennis balls that are glued together can be stacked on top of one another showing the two most important
Eddy current and Lenz’s law
An interesting demonstration of eddy current Plastic pipeis made by dropping a spherical or a cylindrical magnet down a
Bicycle gyroscope
The bicycle gyroscope is used to demonstrate torque induced procession. Such a gyroscope seemingly defies gravity. This is a useful
