Thread #16917556
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>the speed of light is a universal constant but it's impossible to measure the speed of light
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>>16917556
In 1999, physicist Lene Hau and her team at the Rowland Institute for Science successfully slowed light to roughly 38 mph by passing it through a Bose-Einstein condensate. This extreme slowing was achieved using ultracold sodium atoms in a vacuum, creating a medium that reduced the speed of light by a factor of over 20 million.
I don't see how there's a two-way issue with the measurement; you can see it.
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If light is made out of the same foundational building blocks that all matter is, just in a different shape configuration lending to its unique properties, than the speed of light is determined by the total quantity of base building blocks in existence, which is Pi, which is why the Planck constant exists
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By this point its been a decade since a bunch of lab coats filmed a pulse of light using a series of high speed cameras synced to gain enough of a framerate to see its illumination physically moving.
Its been so long, consumer advancements has been good enough that fucking mid end youtubers has tried to replicate this to various degrees for monetization of 1-3 videos.
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>>16917556
you can measure the round trip time, but not the one-way time
you might wonder why not measure from both locations and compare them, but that leads to the synchronization problem.
https://en.wikipedia.org/wiki/Einstein_synchronisation
its just the usual anal nit-picking from soientists.
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>>16917856
You're an idiot.
>>16917978
You are also an idiot.
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okay but if the speed of light was different in different directions then wouldn't there be no cmb in one direction?
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>>16922005
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>>16922005
>>16922005
>okay but if the speed of light was different in different directions
It's not, you observe redshift / blueshift on relative movements. That's because you couple the wave into the ether. Simple proof, missed for a century.
> then wouldn't there be no cmb in one direction?
Nobody knows cmb origin-
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>>16922005
Prove that all that noise isn't caused by differences in the speed of light traveling at that specific angle.
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>>16922020
>Prove that all that noise isn't caused by differences in the speed of light traveling at that specific angle.
Mapping cmb uses high directional antennas. That avoids angled reception. Better idea maybe: The higher intensity areas are an outcome of "The Dome" reflections.
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>>16917875
>put 10 dollars in a savings account
>immerse self in ultracold sodium in a vacuum
>time slows by a factor of over 20 million
>come out after 5 minutes (from your perspective)
>collect trillions of dollars