So it does happen on a small local scale though. It happens on ALL scales.
But everything is expanding from everything. Meaning the observer is always centred of the expansion. This is because volume is constant. The rasins themselves do expand, but locally it’s such a small scale (10^-23 m/s for our solar system).
This also works for how we understand the change in density. Volume is constant, but we’ve gone from infinitely dense to almost nothing.
We went over this, we observe the distance between galaxies increasing, but the distance between atoms has not.
The expansion happens everywhere, but subatomic forces massively overpower the expansion, so atoms don’t expand.
Likewise, raisins are strong enough to not get pulled apart by the expanding bread. There may be slight force on them, but the bread expanding by a factor of 2 leaves the raisins the same size.
I don’t understand how you think a change in distance can be detectable by light between galaxies, but not detectable by like between ends of a metre bar, or between electrons.
So it does happen on a small local scale though. It happens on ALL scales.
But everything is expanding from everything. Meaning the observer is always centred of the expansion. This is because volume is constant. The rasins themselves do expand, but locally it’s such a small scale (10^-23 m/s for our solar system).
This also works for how we understand the change in density. Volume is constant, but we’ve gone from infinitely dense to almost nothing.
We went over this, we observe the distance between galaxies increasing, but the distance between atoms has not.
The expansion happens everywhere, but subatomic forces massively overpower the expansion, so atoms don’t expand.
Likewise, raisins are strong enough to not get pulled apart by the expanding bread. There may be slight force on them, but the bread expanding by a factor of 2 leaves the raisins the same size.
I don’t understand how you think a change in distance can be detectable by light between galaxies, but not detectable by like between ends of a metre bar, or between electrons.