An experiment he carried out to determine the speed of light was by far the most accurate which had been carried out up to that time and was correct to within half of one percent.
Isang eksperimento siya natupad upang matukoy ang bilis ng ilaw ay sa pamamagitan ng malayo ang pinaka-tumpak na had been natupad hanggang sa oras na iyon ay tama at sa loob ng kalahati ng isang porsiyento.