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| Demonstration to observe energy transitions. Tubes are available with trace amounts of Mercury or Neon filling |
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Charge/Mass Ratio of the Electron |
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| The specific electron charge e/m can be quantitatively determined with this tube and coils. Parallax-free measurement of the dia. |
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Li ght Emitting Diodes |
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| A demonstration of the linear relationship between the photon energy e and light frequency f, to estimate Planck's Constant. |
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Demonstration Cathode Ray Oscilloscope |
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| Open cathode ray tube mounted on base plate; prismatic deflection; zinc silicate florescent screen. Ideal teaching apparatus. |
