In light speed.
The speed of light was first measured in 1676 by Danish astronomer Ole Rømer using observations of the moons of Jupiter. Rømer's work provided the first quantitative estimate of the speed of light.
1
They are equal.
how far u can travel at the speed of light in a year
it was faucault who first measured the speed of light in water ......
It's never been measured, but it is assumed to be the same as the speed of light.
there is none.
~33 Ohm
James Clerk-Maxwell did. He was shown to be correct when the speed was actually measured.
It's never been measured, but it is assumed to be the same as the speed of light.
The wavelength of a light wave is typically measured using a device called a spectrophotometer or a spectrometer. These devices split the light into various wavelengths and measure them with detectors to determine the exact wavelength of the light wave. Wavelength can also be measured indirectly using the speed of light equation, where wavelength = speed of light / frequency.
Olaf Roemer