AWhat changed
Measured the gravitational frequency shift of photons over a laboratory height.
Scientific scope
The record is the exact two-author 1960 Physical Review Letters report. It does not absorb Einstein’s prediction, Mössbauer’s resonance discovery, related contemporaneous measurements or later higher-precision redshift tests.
Evidence
The linked sources identify this contribution and its scope. WRS has not independently reconstructed the scientific claims. The record is the exact two-author 1960 Physical Review Letters report. It does not absorb Einstein’s prediction, Mössbauer’s resonance discovery, related contemporaneous measurements or later higher-precision redshift tests.
Contributors
- Robert V. Pound · SCIENCE: Named source author of the scoped work; individual effort shares are not measured.
- Glen A. Rebka Jr. · SCIENCE: Named source author of the scoped work; individual effort shares are not measured.
Provisional WRS assessment, edition 2026-10-16.1. Independent expert calibration is pending. This grade does not certify correctness or assign ownership.
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