Percobaan Michelson-Morley: Perbedaan antara revisi
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| Stanwix ''et al.''<ref name=stanwix />||2005 || Mirip dengan Wolf ''et al.'' (2003).<!-- The frequency of two cryogenic oscillators was compared. In addition, the apparatus was set into rotation. -->Memuat analisa data tahun 2004–2005.
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| Herrmann ''et al.''<ref name=Herrmann1 />||2005 || Mirip dengan Müller ''et al.'' (2003).
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| Stanwix ''et al.''<ref name=stanwix2 />||2006 || Lihat Stanwix ''et al.'' (2005). Memuat analisa data tahun 2004–2006.
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=== Pengujian lain terhadap invariansi Lorentz ===
<!--{{Further|Modern searches for Lorentz violation}}-->
[[Berkas:Lithium-7-NMR spectrum of LiCl (1M) in D2O.gif|jmpl|225px|Gambar 10.
Contoh-contoh percobaan yang tidak didasarkan pada prinsip Michelson–Morley, yaitu pengujian isotropi non-optik yang menghasilkan tingkat ketepatan yang bahkan lebih tinggi, adalah [[:en:Hughes–Drever experiment|Perbandingan jam atau percobaan Hughes–Drever]].<!-- In Drever's 1961 experiment, <sup>7</sup>Li nuclei in the ground state, which has total angular momentum ''J''=3/2, were split into four equally spaced levels by a magnetic field. Each transition between a pair of adjacent levels should emit a photon of equal frequency, resulting in a single, sharp spectral line. However, since the nuclear wave functions for different ''M<sub>J</sub>'' have different orientations in space relative to the magnetic field, any orientation dependence, whether from an aether wind or from a dependence on the large-scale distribution of mass in space (see [[Mach's principle]]), would perturb the energy spacings between the four levels, resulting in an anomalous broadening or splitting of the line. No such broadening was observed. Modern repeats of this kind of experiment have provided some of the most accurate confirmations of the principle of [[Lorentz covariance|Lorentz invariance]].--><ref group=A name=haugan/>
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