Despite this limited path length, Foucault was able to measure the position of the displaced image of the slit with considerable accuracy, and his figure for the speed of light (298000 km/s) is within 0.6% of the modern value.
Foucault was able to measure the position of the displaced image of the slit with considerable accuracy. This was despite this limited path length. His figure for the speed of light (298000 km/s) is within 0.6% of the modern value. This is despite this limited path length.