SWhat changed
Four measured lines in the hydrogen spectrum fit a surprisingly compact number pattern. Balmer expressed their wavelengths using a common scale b times m^2/(m^2-4), with integer m=3,4,5,6. He then compared the extension of that pattern with additional violet and ultraviolet observations. This was a useful empirical rule before an atomic theory explained why those numbers appeared.
Scientific scope
Four measured lines in the hydrogen spectrum fit a surprisingly compact number pattern. Balmer expressed their wavelengths using a common scale b times m^2/(m^2-4), with integer m=3,4,5,6. He then compared the extension of that pattern with additional violet and ultraviolet observations. This was a useful empirical rule before an atomic theory explained why those numbers appeared. The contribution is the hydrogen-series pattern and its historical comparisons, not new wavelength measurements or a quantum-mechanical derivation. The original scale 3645.6 in 10^-7 mm is a wavelength parameter, not Planck constant; these historical values are not modern vacuum or isotope-corrected wavelengths. A speculative extension to other integer families is not the later general Rydberg law. Angstrom supplied the principal measurements; Hagenbach encouragement and communication and Vogel/Huggins observations keep separate roles.
Evidence
The linked original works support the scoped statement and contribution attribution. WRS has not independently replayed experiments or reconstructed a full mathematical proof. The contribution is the hydrogen-series pattern and its historical comparisons, not new wavelength measurements or a quantum-mechanical derivation. The original scale 3645.6 in 10^-7 mm is a wavelength parameter, not Planck constant; these historical values are not modern vacuum or isotope-corrected wavelengths. A speculative extension to other integer families is not the later general Rydberg law. Angstrom supplied the principal measurements; Hagenbach encouragement and communication and Vogel/Huggins observations keep separate roles.
Contributors
- The named authors in the research record · SCIENCE: Source-listed authors for the exact contribution; experimental subjects are not autonomous scientific authors. Source support and predecessor work retain separate roles. Individual effort shares and unresolved identities are not inferred.
Provisional WRS assessment, edition 2026-10-23.5. Independent expert calibration is pending. This grade does not certify correctness or assign ownership.
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