Will electromagnetic radiation propagate infinitely through a vacuum?
Thanks
No. All waves need a medium.
EM waves can't travel through a vacuum. Space is actually filled with a transparent, infinitely rigid/dense but completely non-viscous fluid.
>>7854014
It's time to go to bed grandpa Kelvin.
>>7854014
sublime trolling, thank you. it made me think of an obvious answer. stars are very far away.
>>7854009
> infinitely
>>7854030
would it propagate and never stop propagating given no change in it's environmental properties other than location.
>>7854042
We'll have to wait and see.
>>7854059
use some induction if you would
>>7854014
why exactly was aether theory completely scraped while dark matter theory is considered probably true?
>>7854285
Read the Wikipedia pages on those two topics.
>>7854009
It isn't known. Some people believe that it would, others hold to the theory that light might reduce in strength over time due to it bleeding into other dimensions.
>>7854009
So far, poster, so far...
>>7854285
Because simulations of galaxies do not match what's observed unless you include this big swirling cloud of matter, but no such matter is observed so it must be non-interacting.
Numerous other proposals for what might be causing the effect have been floated, but none reproduce the effect as well as there just being a bunch of stuff there that only interacts gravitationally.
