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Sandeep T S
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Is anyone expermently measured two way speed of light from moving source using time of flight?
Moving respect to me or experimentalistIbix said:Moving with respect to what? All sources are moving in most frames of reference.
I searched lot in this site. http://www.edu-observatory.org/physics-faq/Relativity/SR/experiments.html#Doppler_shift , but I couldn't get any information about experiment I prescribed above.Sandeep T S said:Moving respect to me or experimentalist
Take any two way speed measurement process and walk past it. The source is now moving with respect to you. Do you expect the results to change because you are walking?Sandeep T S said:Moving respect to me or experimentalist
The Beckmann and Mandics paper cited under Tests of Light Speed From Moving Sources would seem to fit exactly.Sandeep T S said:I searched lot in this site. http://www.edu-observatory.org/physics-faq/Relativity/SR/experiments.html#Doppler_shift , but I couldn't get any information about experiment I prescribed above.
I read that paper , here optical extinction is not a problem but here Beckman used to find violation in speed of light using fringe shift. Not directly measured speed of light. This experiment not useful for me.Ibix said:The Beckmann and Mandics paper cited under Tests of Light Speed From Moving Sources would seem to fit exactly.
I m not arguing with the credibility of Beckman's experiment.Ibix said:And why isn't Beckmann and Mandic's paper acceptable? If they show that the speed of light doesn't change why do you care that they don't directly measure the speed? Why would you expect it to come out different in this one experiment?
Aircraft radars routinely test the two-way speed of light between moving objects. They wouldn't produce accurate position information if the speed (speed relative to what?) of either the source or the target affected the two-way speed of light.Sandeep T S said:Is anyone expermently measured two way speed of light from moving source using time of flight?
Can you share any link to get this experiment.Nugatory said:Aircraft radars routinely test the two-way speed of light between moving objects. They wouldn't produce accurate position information if the speed (speed relative to what?) of either the source or the target affected the two-way speed of light.
These experiments seems to be fine for my criteria. As NASA did, any recent experimentalist repeat this experiment on vacuum in laboratory by measuring distance between moving body and observer.Klystron said:If you prefer a longer experimental baseline, NASA left radar reflectors on the surface of the moon. You can locate published reviewed papers on experiments that bounced signals from the moving Earth off the moving moon. These experiments measured earth-moon distances and motions more precisely than optical telescopes. You can select data sets from voluminous online sources that can be used to compute speed of light in vacuum (possibly corrected for passage through Earth's atmosphere for ground based radars).
For an even longer baseline consider transmissions from interplanetary probes including Voyager 1 & 2. I seem to remember announcements years ago that Voyager data transmissions and two-way communication were used to validate several RF (radio-frequency) measurements.
Closer to earth, satellite transmission delay times might provide data for your experiments.
Nugatory said:Aircraft radars routinely test the two-way speed of light between moving objects. They wouldn't produce accurate position information if the speed (speed relative to what?) of either the source or the target affected the two-way speed of light.
I wouldn't describe aircraft radars as experimental. More like routine performed continuously with thousands of lives depending on it. It would be headline news if they stopped working properly.Sandeep T S said:Can you share any link to get this experiment.
The speed of light is a fundamental physical constant that represents the speed at which light travels in a vacuum. It is denoted by the letter c and has a value of approximately 299,792,458 meters per second.
The speed of light can be measured using various methods, such as time of flight experiments, interferometry, and the use of lasers. In time of flight experiments, the speed of light is calculated by measuring the time it takes for light to travel a known distance.
A time of flight experiment is a method used to measure the speed of light by measuring the time it takes for light to travel a known distance. This is typically done by sending a pulse of light through a medium and measuring the time it takes for the pulse to reach a detector at a known distance.
Time of flight experiments have some limitations, such as the accuracy of the timing equipment used, the effects of atmospheric conditions on the speed of light, and the difficulty in measuring extremely short time intervals. Additionally, the speed of light may vary slightly depending on the medium through which it is traveling.
Measuring the speed of light is important for understanding the fundamental laws of physics and the nature of the universe. It has also played a crucial role in the development of technologies such as telecommunications, astronomy, and navigation. Additionally, it has helped to confirm the theory of relativity and has led to advancements in scientific research and experimentation.