From early experiments with lanterns to Einstein’s revelations about space and time, the speed of light has proven to be far ...

SIR JOSEPH LARMOR has kindly pointed out to me that it is incorrect, in the interpretation of Fizeau's experiment, to assume that the velocity of propagation of light is the group velocity, so that I ...

Every high school physics student knows c, or the speed of light, it’s 3 x 10^8 metres per second. More advanced or more curious students will know that this is an approximation, and the figure of 299 ...

The road in Paris named after French physicist Hippolyte Fizeau, as drawn by an artist in 1896. (Credit: F Séguin, Dessinateur. Musée Carnavalet, Histoire de Paris. D.10405) An 1851 experiment in ...

MR. CUNNINGHAM seems determined that the principle of relativity shall assert supremacy as regards the Fizeau effect on the velocity of light, arising from motion of the transmitting medium. This is a ...