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.
  7A10.40Several commercial solar cells.
  7A10.40Commercial solar cell spins propeller using small arc lamp.
  7A10.40Commercial solar cell spins propeller using halogen light source.
  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 of periodic table.
  7B50.50Wall chart or online applet 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.
  7D30.50Expansion cloud chamber with water and compression bulb.
  7D30.50Wilson cloud chamber, piston compression type.
  7D30.50Alpha range measured using small cloud chamber.
  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.

7E Elementary Particles


7E10 Miscellaneous


7F Relativity


7F10 Special Relativity


7F20 General Relativity