Quote of the moment:
"Stop staring at my breasts."
"Then stop shaking them at me."
Here's to doing better than the last guy:
In 1638 in the book Two new sciences Galileo suggested that the speed of light could be tested to find if it was instantaneous or has finite speed. From one hill top at night a signal light would be shone on a distant hill where an assistant would flash a light back, with out a delay in the flashes it could be concluded that "if not instantaneuos, light is very swift."
In the 1670's Ole Romer used jupiter's eclipsing it's moon Io to calculate the speed of light as 225,000 km/sec. Romer's view that the speed of light was finite were not accepted until...
James Bradley in 1728 discovered the Aberration of Light, a source of inaccuracy in observing the motion of stars, that is cause by light having finite speed. From his data the speed of light was found to be 294,000 km/sec.
In 1849 Armand Hippolyte Louis Fizeau build a device with a light shining on a mirror, with a 720 tooth wheel spinning in the path of the light beam. By adjusting the speed of the wheel the delay from the light beams journey could be calculated. His result was 315,400 km/sec
In 1862 Leon Foucault replaced the spinning wheel with a mirror and measured the displacement of the light beam. His speed of light result was 297,700km/sec
In 1878 Albert Abraham Michelson Conducted Foucalt's experiment again on a larger baseline (2,000 feet rather than 20 meters) and came up with a speed of 299,940 km/sec
In 1946 Louis Essen used microwaves in a known inclosed space and electromagnetic theory to calculate the speed of light as 299,792 Km/sec.
In 1983 the speed of light in a vaccume was defined as 299,792.458 km/sec. The unit of length the 'meter' was defined as the distance light travels in 1/299792458 of a second.
In other news I got laid off from my part time job.
"Stop staring at my breasts."
"Then stop shaking them at me."
Here's to doing better than the last guy:
In 1638 in the book Two new sciences Galileo suggested that the speed of light could be tested to find if it was instantaneous or has finite speed. From one hill top at night a signal light would be shone on a distant hill where an assistant would flash a light back, with out a delay in the flashes it could be concluded that "if not instantaneuos, light is very swift."
In the 1670's Ole Romer used jupiter's eclipsing it's moon Io to calculate the speed of light as 225,000 km/sec. Romer's view that the speed of light was finite were not accepted until...
James Bradley in 1728 discovered the Aberration of Light, a source of inaccuracy in observing the motion of stars, that is cause by light having finite speed. From his data the speed of light was found to be 294,000 km/sec.
In 1849 Armand Hippolyte Louis Fizeau build a device with a light shining on a mirror, with a 720 tooth wheel spinning in the path of the light beam. By adjusting the speed of the wheel the delay from the light beams journey could be calculated. His result was 315,400 km/sec
In 1862 Leon Foucault replaced the spinning wheel with a mirror and measured the displacement of the light beam. His speed of light result was 297,700km/sec
In 1878 Albert Abraham Michelson Conducted Foucalt's experiment again on a larger baseline (2,000 feet rather than 20 meters) and came up with a speed of 299,940 km/sec
In 1946 Louis Essen used microwaves in a known inclosed space and electromagnetic theory to calculate the speed of light as 299,792 Km/sec.
In 1983 the speed of light in a vaccume was defined as 299,792.458 km/sec. The unit of length the 'meter' was defined as the distance light travels in 1/299792458 of a second.
In other news I got laid off from my part time job.
VIEW 6 of 6 COMMENTS
malloreigh:
they say i am a chameleon. so wait... that's lovely that people figured it out pretty close-to-truth way back when. science is interesting. finding answers based on effects and... wow, i do not have a science brain.
malloreigh:
but i do have a logic brain!