Balmer Series and Rydberg Constant

Topics covered:

- Single-electron atom

- Bohr atomic model

- Balmer series

- Rydberg constant

- Binding energy

Principles and objectives:

The spectral lines of hydrogen and mercury are examined using a diffraction grating. The known spectral lines of Hg are used to determine the grating constant. The wavelengths of the visible lines of the Balmer series of H2 are measured. The Rydberg constant and energy levels are also calculated.

Comments:

A simple setup for advanced experiments. Determination of the fundamental Rydberg constant in one hour.

The High Voltage power supply with high safety standards makes the experimentation safe.

- Hydrogen spectral tube, H2 / Mercury spectral tube, Hg - Supports for spectral tubes, pair - Universal rotating stand - Rowland network 600 lines/mm - Expert base / Stainless steel rod, l = 500 mm, d = 10 mm / Double nut / Rod connector - Graduated ruler, l=1000 mm / Pair of red plastic sliders / Tape measure, l = 2 m - Protection for spectral tubes - High voltage DC power supply: 0... ± 10 kV, 2 mA - 30 kV Connection wire, l 1000 mm / Insulating support / Tripod