General / Off-Topic So... Do we have free will? :)

ArtiX

ArtiX
Ok, let me TRY and explain what this video is. And it's just a visualisation of an effect that occurs, which, if you think logically, should not happen like that.

Imagine a couple of kids on a Merry-go-round. I'm sure everyone knows what happens when it starts to spin too fast, right?

The same SHOULD happen in the video. Shouldn't it? :unsure:


What happens, is just the opposite, BUT it depends on the mass as well, anything that passes a certain mass-threshold is caught in the center, everything else either stays "in-orbit" or is influenced by tidal forces (that's just bc of the size of the pot and bc the stir wasn't perfect.) :sneaky:
I'll just leave it at that. Maybe someone else can explain better than me, am inbetween things so it's a bit rushed. :)

Just for input and consideration.




Edit: forgot the most important bit, look at how the outer and inner particles (the galaxy pepper, lol) move "at different" speed, seemingly, but they travel exactly the same distance.
 
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ArtiX

ArtiX
@picommander did you watch the video i made? You can see the effect there.

The reason for the outer mass moving slower is the gravitational- vs. orbital pull. They move at the same speed, but the orbit is larger, resulting in the differentiation.
 

Shinji Ikari

Shinji Ikari
picommander said:
A somewhat heretic follow-up question would be how they can be so sure as all current physics don't seem to work anymore when it comes to calculating the outer regions of spiral galaxies (the're moving faster than they should in relation to the inner regions), which in the end led to such exotic auxiliary constructions like dark matter and dark energy.
Click to expand...

Well, there are proposals to modify how gravity works in order to fit the observations though they are not taken too seriously and there's good evidence to suggest that's not the case.

 

Shinji Ikari

Shinji Ikari
picommander said:
Thanks for this one, I don't have the time right now but certainly will watch it later. I like the videos of this guy very much, I've already watched quite a few of him. He's also very clear so that even a non-physicist and non-native speaker like me can usually follow him very well. And that alone is already quite outstanding! :)
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Yeah, and he does try and explain it well, many youtubers who also talk about physics don't give the proper details to genuinly understand what you are hearing, although his latest string theory videos are pretty darn hard to grasp though I don't blame him.
 

Chris Simon

Chris Simon
Well, my personal theory about dark matter (well, personal - it's based on hundreds of other people's ideas) is that it is either a particle so light that it doesn't interact with anything (like neutrinos) or (and I really like this one) - it is a particle so heavy that it doesn't manifest as a particle at all. I mean, normal particles are a fluctuation in quantum field. Let's say that an electron field has a certain probability to ripple in a certain point in space and that ripple is what we detect as an electron.
What if there is a particle field so heavy that it doesn't ripple, therefore it doesn't create a detectable particle. It just sits there, doing nothing, having a lot of mass and screwing up gravity. :LOL:
Kind of like Higgs field, which also doesn't like to create particles per se and rather just presents "friction" which gives other particle fields their mass.

As for the dark energy, I have one theory that is so wild that I'm really proud of it as a sci-fi geek.
Dark energy (or energy density of vacuum) is supposedly what makes the universe's expansion accelerate. And we don't know where it comes from.
Well, what if it doesn't come from our universe at all? Meaning - what if it isn't a property of the space time but rather an outside influence?
When I'm explaining the expansion of the universe to somebody, I always like to do it on the famous rubber baloon example. If you imagine a lot of marker pen dots on a baloon that is being inflated. The dots are coming apart but not because they are moving across the rubber, but simply because the rubber between them is stretching. And they don't move in any particular direction, rather every dot is moving away from every other dot - an observer in any place of the baloon would see everything moving away as if they were the centre of the (baloon) universe). That is a 2D space curved into 3rd dimension with a curvature that is slowly flattening as the baloon expands.
What if our universe is the same, only one dimension higher? A 3D space curved into 4th (spatial) dimension. (spoiler - we kinda know it is)
Now the fun part. If you lived in the 2D space of the stretching baloon, you wouldn't be able to understand why is it getting bigger, because nothing you can observe in the rubber itself gives you any indication of the forces that are applied. It's the air inside the baloon that does the stretching - an outside force that isn't a property of the rubber, nor is it a part of its "equation"
Similarly, what if the thing we call dark energy is a force applied from 4th dimension that makes our 3D space bigger and flatter? Nothing we can observe, measure or calculate in this universe would ever indicate the cause of this expansion.

Or imagine a drop of paint in a glass of water, spreading by Brownian motion. If you lived in the droplet, you wouldn't understand why it is getting bigger and is slowly diluting (metaphorically in the case of our universe), because the thing that causes the "expansion" of your droplet isn't a property of your droplet, but rather the water molecules outside, tugging on "your" molecules inside.

You know... 6am thoughts. :)
 
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WeComeInPeace

WeComeInPeace
Chris Simon said:
Well, my personal theory about dark matter (well, personal - it's based on hundreds of other people's ideas) is that it is either a particle so light that it doesn't interact with anything (like neutrinos) or (and I really like this one) - it is a particle so heavy that it doesn't manifest as a particle at all. I mean, normal particles are a fluctuation in quantum field. Let's say that an electron field has a certain probability to ripple in a certain point in space and that ripple is what we detect as an electron.
What if there is a particle field so heavy that it doesn't ripple, therefore it doesn't create a detectable particle. It just sits there, doing nothing, having a lot of mass and screwing up gravity. :LOL:
Kind of like Higgs field, which also doesn't like to create particles per se and rather just presents "friction" which gives other particle fields their mass.

As for the dark energy, I have one theory that is so wild that I'm really proud of it as a sci-fi geek.
Dark energy (or energy density of vacuum) is supposedly what makes the universe's expansion accelerate. And we don't know where it comes from.
Well, what if it doesn't come from our universe at all? Meaning - what if it isn't a property of the space time but rather an outside influence?
When I'm explaining the expansion of the universe to somebody, I always like to do it on the famous rubber baloon example. If you imagine a lot of marker pen dots on a baloon that is being inflated. The dots are coming apart but not because they are moving across the rubber, but simply because the rubber between them is stretching. And they don't move in any particular direction, rather every dot is moving away from every other dot - an observer in any place of the baloon would see everything moving away as if they were the centre of the (baloon) universe). That is a 2D space curved into 3rd dimension with a curvature that is slowly flattening as the baloon expands.
What if our universe is the same, only one dimension higher? A 3D space curved into 4th (spatial) dimension. (spoiler - we kinda know it is)
Now the fun part. If you lived in the 2D space of the stretching baloon, you wouldn't be able to understand why is it getting bigger, because nothing you can observe in the rubber itself gives you any indication of the forces that are applied. It's the air inside the baloon that does the stretching - an outside force that isn't a property of the rubber, nor is it a part of its "equation"
Similarly, what if the thing we call dark energy is a force applied from 4th dimension that makes our 3D space bigger and flatter? Nothing we can observe, measure or calculate in this universe would ever indicate the cause of this expansion.

Or imagine a drop of paint in a glass of water, spreading by Brownian motion. If you lived in the droplet, you wouldn't understand why it is getting bigger and is slowly diluting (metaphorically in the case of our universe), because the thing that causes the "expansion" of your droplet isn't a property of your droplet, but rather the water molecules outside, tugging on "your" molecules inside.

You know... 6am thoughts. :)
Click to expand...
Flatland! :)

Once at 6am, while de-rigging my telescope, I started wrapping up dimensions in euclidean space. If you curve X, Y and Z into circles, you get room for an extra set of dimensions which are mirrored versions of the three we know. Still at a 90 deg angle.
 

znôrt

znôrt
in both examples you could possibly measure the external effects (gravity and surface tension acting on molecules of the droplet, the curvature of the rubber world ...) which would prompt you to assume them as physical laws, which is what we do in our 3d world ... you do not fully understand why it works, but you understand how. with dark matter we do have a contradiction between observation and predictions, but the observation that there are very likely things currently eluding our observation is quite spot on :)
 

Chris Simon

Chris Simon
WeComeInPeace said:
Flatland! :)

Once at 6am, while de-rigging my telescope, I started wrapping up dimensions in euclidean space. If you curve X, Y and Z into circles, you get room for an extra set of dimensions which are mirrored versions of the three we know. Still at a 90 deg angle.
Click to expand...
"Inside our Earth, there is another, much bigger one."
 

Gortron

Gortron
WeComeInPeace said:
Here is a pitch:

On one hand science and philosophy has shown that the Universe (that includes you) seems to be deterministic, build on a foundation of uncertainty. Once the dices have been thrown, everything follows the laws of nature. This seems to rule out free will as we know it.

On the other hand you make choices every day.

So which one is it? :)
Click to expand...
Actually they don't say that. Deterministic means there is a known outcome (the opposite of uncertainty)
 
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