Michelson's Velocity of Light Data

A Michelson interferometer. Photograph by Falcorian
Interferometer

Description

The table below gives Albert Michelson's measurements of the velocity of light in air, made from June 5 to July 2, 1879. The given values + 299,000 are Michelson's measurements in km/sec. The number of cases is 100 and the true value is 734.5.

Michelson's Data
Measured Velocity
850
740
900
1070
930
850
950
980
980
880
1000
980
930
650
760
810
1000
1000
960
960
960
940
960
940
880
800
850
880
900
840
830
790
810
880
880
830
800
790
760
800
880
880
880
860
720
720
620
860
970
950
880
910
850
870
840
840
850
840
840
840
890
810
810
820
800
770
760
740
750
760
910
920
890
860
880
720
840
850
850
780
890
840
780
810
760
810
790
810
820
850
870
870
810
740
810
940
950
800
810
870

Sources and Resources

Download Data

Click on the link below to download the data in tab-separated text format. This is a standard formats that can be imported into most statistical and spreadsheet software.