Modern Physics
Quantum Effects
Photoelectric Effect
Semiconductors
7A10.00 Photoelectric Effect with Photocell
To demonstrate the photoelectric effect.
7A10.10 Photoelectric Effect with Zinc Plate
To demonstrate the energy of light is a function of its frequency not intensity.
7A10.11 Photoelectric Effect (Simulation)
To show the effects of light frequency, light intensity and stopping potential on photocurrent.
7A30.10 LED in Liquid Nitrogen
To show that when an LED is immersed in liquid nitrogen, the wavelength of light emitted changes.
Wave Mechanics
7A50.05 Particle in a Box (Simulation)
To show the properties of a quantum mechanical particle confined to a box.
7A50.11 Quantum Mechanical Wave and Barrier Penetration (Simulation)
To show a wave tunneling through a potential barrier.
7A50.13 Scanning Tunneling Microscope
To demonstrate operation of a scanning tunneling microscope.
7A50.40 Bohr Model Vibrating Circular Wave
To demonstrate the quantization of Bohr's model of the hydrogen atom using a vibrating loop of wire.
Particle/Wave Duality
X-ray and Electron Diffraction
Condensed Matter
7A55.20 Single Photon Interference
To show the interference pattern produced by single photons passing through a double slit.
7A60.10 Sargent Welch Electron Diffraction
To show the diffraction patterns produced by an electron beam passing through various crystal lattice structures.
7A60.11 Nakamura Electron Diffraction
To show electron diffraction through a crystal lattice.
To demonstrate the properties of superfluid helium, including the lambda transition (quiescence), the creep effect and the fountain effect.
Atomic Physics
Spectra
Absorption
Fine Splitting
To show the emission line spectrum for various low pressure gases.
7B11.10 Sodium Absorption and Emission Spectrum
To show the absorption and emission lines of sodium flames.
7B11.13 High Pressure Sodium Emission and Absorption Line
To show the emission and absorption line spectrum for high pressure sodium gas.
To show the splitting of mercury interference lines in the presence of a strong magnetic field.
Electron Properties
Atomic Models
To show the deflection of an electron beam by electric and/or magnetic fields within a cathode ray tube.
7B35.50 Electron Momentum Paddle Wheel
Shows that an electron beam has momentum and can rotate a paddle wheel
7B50.17 Pauli Exclusion and Electron Degeneracy Pressure
To show only two electrons can occupy an orbital.
Nuclear Physics
Radioactivity
Particle Detectors
Nuclear Magnetic Resonance (NMR)
To demonstrate radioactive decay of various sources with a Geiger counter.
To observe particle tracks from a radiation source and cosmic muons.
7D40.21 Magnetic Torque Apparatus
To demonstrate torque on a magnetic dipole in a constant magnetic field.
7D40.41 Nuclear Spin Precession in the Earth's Magnetic Field
To see and hear the precession of the magnetic moments of hydrogen nuclei in the Earth’s magnetic field.
Models of the Nucleus
7D50.10 Rutherford Scattering (Video)
To show scattering of alpha particles by the atoms in gold foil.
7D50.40 Thomson and Rutherford Atoms
To simulate scattering experiments conducted on early models of the atom.
Relativity
Special Relativity
General Relativity
To show that the force of gravity on a body cannot be distinguished from an acceleration.
7F20.20 Precession of the Perihelion of Mercury (Video)
To show the precession of the perihelion of mercury.
Lasers
Laser Construction
To demonstrate an optical resonator produces lasing light.
Measurement Tools
To demonstrate the function of a lock-in amplifier.