Measurement of the relativistic Doppler shift in neon

Matti Kaivola*, Ove Poulsen, Erling Riis, Siu Au Lee

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

47 Citations (Scopus)


The relativistic Doppler shift is measured by the counting of the frequency difference between two cw dye lasers. One laser is locked to a two-photon transition in a fast beam of neon, and the other is locked to the same two-photon transition in thermal neon. The experimental result is compared to the prediction of special relativity. The result is in excellent agreement with this theory. An accuracy of 4×10-5 is obtained, which provides the most accurate direct verification of time dilatation to date.

Original languageEnglish
Pages (from-to)255-258
Number of pages4
JournalPhysical Review Letters
Issue number4
Publication statusPublished - 28 Jan 1985
MoE publication typeA1 Journal article-refereed


Dive into the research topics of 'Measurement of the relativistic Doppler shift in neon'. Together they form a unique fingerprint.

Cite this