----- Original Message ---- From: Mike Stay <metaweta@gmail.com> To: math-fun <math-fun@mailman.xmission.com> Sent: Thursday, September 4, 2008 12:59:51 PM Subject: Re: [math-fun] Reflection from a moving mirror Some references: http://www.nature.com/nature/journal/v248/n5450/abs/248660a0.html http://tinyurl.com/6zl9cs R. Gerharz, "Detection of the transverse Doppler effect with laser light." Proc. IEEE (Corresp.),vol. S2,p. 218, Feb. 1964. ----------------------------------------- I downloaded the Nature paper by Jennison and Davies. The experiment looked for a transverse Doppler shift from a rotating mirror, and it was claimed to be sensitive to 1 part in 10^16. A rotating mirror with a speed of 2-20 m/s formed one arm of a Michelson interferometer. A fixed mirror on a piezo stage formed the other arm, allowing the apparatus to be tested by introducing a first-order Doppler shift. A second-order Doppler shift of the expected magnitude would have produced a beat frequency of 1 to 1/12 Hz. No such beat was seen. I can email a copy of the 2-page paper to anyone who is interested. Gene