In the 19th century Hippolyte Fizeau developed a method to determine the speed of light based on time-of-flight measurements on Earth and reported a value of 7008315000000000000♠315000 km/s.
Pada abad ke-19 Hippolyte Fizeau mengembangkan metode untuk menentukan laju cahaya berdasarkan pengukuran waktu terbang di Bumi dan melaporkan nilai 7008315000000000000♠315000 km/s.