* Early Attempts: Ancient Greek philosophers like Empedocles and Aristotle thought light traveled instantaneously, but their methods were limited.
* Galileo Galilei (1600s): Tried to measure the speed of light by timing lanterns between distant hills. His experiment failed, but it showed the speed was too fast for his method.
* Ole Rømer (1676): Observed the eclipses of Jupiter's moon Io, noticing they were delayed when Earth was farther from Jupiter. He calculated a rough estimate of the speed of light.
* Hippolyte Fizeau (1849): Performed the first successful terrestrial measurement of the speed of light using a rotating toothed wheel and a distant mirror.
* Albert Michelson (1879): Made increasingly precise measurements of the speed of light using an interferometer, earning him the Nobel Prize in Physics in 1907.
In summary, while Rømer's observations were crucial, Fizeau and Michelson's experiments provided the first accurate measurements of the speed of light.
It's important to remember that science is a collaborative process, with many individuals building on each other's work. The discovery of the speed of light was a journey, not a single event.
