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CENCO® AP Physics Lab 23: Balmer Lines for Hydrogen

The Balmer Lines for Hydrogen Lab showcases the diffraction pattern of a hydrogen spectrum tube.

  • Large, Colorful Display of Spectral Diffraction
  • Metric Scale for Easy Measurements
  • Students Measure First Order Spectra to the Left or Right
  • Purpose for Students: to Calculate the Rydberg Constant
By utilizing the positions and distance between spectral lines, students calculate the Rydberg constant. The kit includes a specially designed diffraction bench that fits on the FUNDamentals of Physics FUN Stand. Students can position colored rods at specific spots that line up with the spectral pattern observed through a diffraction grating. The exact wavelength can be determined using the distance of the spectral line to the central maximum.

AP and the Advanced Placement Program are registered trademarks of the College Entrance Examination Board, which was not involved in the production of and does not endorse these products.

Ordering information: This kit includes colored rods, diffraction grating and stand, metric tape, and six hand-held spectrometers. The FUN stands, a spectrum tube power supply and hydrogen gas tube, and a dual red and green laser pointer are required but not included.



Item # Description For Use With Unit Availability Price Quantity
470018-156 CENCO AP Physics Lab 23: Balmer Lines for Hydrogen
1 Lab group Kit of 1 Retrieving


Item # Description Unit Availability Price Quantity
470017-048 Electrodeless Spectrum Tube Power Supply
Each Retrieving
470013-422 Hydrogen
Each Retrieving


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