Demos by PIRA
7A Quantum Effects
7A10 Photoelectric Effect
7A10.10UV light hits charged zinc plate and discharges electroscope.
7A10.35Light through different filters into phototube changes current.
7A10.40Commercial solar cell spins propeller using halogen light source.
7A10.40Commercial solar cell spins propeller using small arc lamp.
7A10.40Several commercial solar cells.
7A10.43Recording modulates laser beam which hits solar cell and amplifier.
7A15 Millikan Oil Drop
7A20 Compton Effect
7A50 Wave Mechanics
7A50.20Tunneling:Microwave analogy using wax prisms.
7A55 Particle/Wave Duality
7A60 X-ray and Electron Diffraction
7A60.10Electron diffraction by aluminum and graphite on CRT.
7A60.50Bragg diffraction using microwaves and steel balls in foam cube.
7A60.50Bragg diffraction using microwaves and steel balls in foam cube.
7A70 Condensed Matter
7B Atomic Physics
7B10 Spectra
7B10.10Hand-held gratings for class to view Hg, Ne discharge tubes.
7B10.11Arc lamp spectra from NaCl, CaCl2, SrCl soaked rods.
7B11 Absorption
7B11.10Absorption spectrum of Na using arc lamp, slit and grating.
7B11.40Arc light spectrum with various filters.
7B13 Resonance Radiation
7B13.50UV light causes mineral and fabric samples to fluoresce different colors.
7B20 Fine splitting
7B30 Ionization Potential
7B35 Electron Properties
7B50 Atomic Models
7B50.10Mechanical models of the hydrogen atom.
7B50.50Wall chart or online applet of periodic table.
7B50.50Wall chart of periodic table.
7D Nuclear Physics
7D10 Radioactivity
7D10.10Geiger counter.
7D10.40Mechanical model of radioactive decay.
7D20 Nuclear Reactions
7D20.10Mousetrap chain reaction experiment.
7D30 Particle Detectors
7D30.11Scintillation counter using Geiger tube.
7D30.50Alpha range measured using small cloud chamber.
7D30.50Wilson cloud chamber, piston compression type.
7D30.50Expansion cloud chamber with water and compression bulb.
7D30.60Cloud chamber with dry ice and alcohol shown on TV camera.
7D30.70Large mechanical model of the cyclotron.
7D40 Nuclear Magnetic Resonance (NMR)
7D50 Models of the Nucleus
7D50.10Rutherford scattering model: Steel balls, launcher, and "hill".
7D50.30"Plum pudding": Corks with magnets float in bowl/solenoid on OHP.