The ratio between b ( v ) {\displaystyle b(v)} and d ( v ) {\displaystyle d(v)} is determined by the Michelson–Morley experiment, the ratio between a ( v ) {\displaystyle a(v)} and b ( v ) {\displaystyle b(v)} is determined by the Kennedy–Thorndike experiment, and a ( v ) {\displaystyle a(v)} alone is determined by the Ives–Stilwell experiment.
Das Verhältnis zwischen b ( v ) {\displaystyle b(v)} und d ( v ) {\displaystyle d(v)} wird aus dem Michelson-Morley-Experiment, das Verhältnis zwischen a ( v ) {\displaystyle a(v)} und b ( v ) {\displaystyle b(v)} aus dem Kennedy-Thorndike-Experiment und schließlich a ( v ) {\displaystyle a(v)} allein aus dem Ives-Stilwell-Experiment bestimmt.