how do scientist measure light

1 ANSWERS

1. amomipais82
   

   Hi,
   The most accurate methods have historically varied depending on the technology of the time. These days, it can be measured directly from time of flight over a known distance using fast photodiodes and electronic recording devices. The greater the distance, the more accurate the estimate
   
   The first measurement, though, required the distance from earth to Jupiter since the clock was basically a sundial. The delay between predicted time verses observed time of an eclipse by Jupiter of one of it's moons was used for the time of flight measurement.
   
   PS The Michaelson-Morely experiment did not measure the speed of light, but rather any small change in it due to its direction. The result was negative.

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