Will electromagnetic radiation propagate infinitely through

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.

File: wildberger.jpg (116KB, 900x900px) Image search: [Google]

116KB, 900x900px

>>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.

>>7854285
>>7857343
I should also point out that if this is the case, it must be some new, exotic particle so far undetected on Earth.

Rest assured that no one is happy about the fact we don't know what's causing these effects.

And don't even get started on dark energy!