1 gen 1920 anni - Albert A. Michelson's Measurements
Descrizione:
Michelson placed two mirrors on top of two mountains (in California) and measured the distance between the two mirrors (35.4 km). He sent a light beam from one mirror to the other. Using accurate timing devices, he carefully calculated the speed of light in the Earth's atmosphere which is 299 798 km/s.
Aggiunto al nastro di tempo:
Data: