Science!! Fucking magnets, how do they work?

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Khane

Khane

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Captain Suave_sl said:
Light captured as both particle and wave:

Photo First: Light Captured as Both Particle and Wave : Discovery News
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Maybe I just confused the shit out of explanations I'd heard before because I am certainly no scientist. But I thought we knew light was both a particle and wave and that's why it can exist in a vacuum (whereas sound waves cannot). It is it's own medium. I feel like I'm trying to sound way smarter than I actually am right now.

EDIT: Nevermind, the article spells that out. I responded before I read!
 
Mario Speedwagon

Mario Speedwagon

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BrutulTM_sl said:
Yeah, the possibilities are endless for sci fi stories where people are raised for their bodies to keep 150 year old senile fucks alive. This could be a dream come true for transgenders as well but it's just not practical because of the difficulty in obtaining young healthy bodies.
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Wouldn't an old as fuck brain still deteriorate and die even attached to a young healthy body? What's the point of being buff if you're already deep into senility?
 
Furry

Furry

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Tuco_sl said:
What's a gravity wave?
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Gravity's effect acts at infinite speed, easily proven with our own solar system. That didn't sit well with scientists at the turn of the century, so they created a mathematical construct that would allow this to happen by creating gravitational fields, basically a gravitational memory with infinite rigidity that follows large bodies of mass around. Essentially, this allowed them to cheat and say that CHANGES in gravity act at the speed of light, which is enough to satisfy relativity. A necessary mathematical artifact of doing this is that you will have gravitational waves emitted whenever two bodies interact and these fields are changed. Especially when the interaction is catastrophic or direct- such as two objects like stars colliding.

I consider it an unproven theory until they detect something. They should be able to detect gravity waves, but have not so far. At best they can infer gravity waves from other interactions, which is far short of direct observation- other unknown forces could be at work.
 
Furry

Furry

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Troll_sl said:
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Actually not the first time I've seen this idea. Superconductors have a lot of unusual properties that we don't understand, and do require far more research. The idea that they can reflect gravity is unusual to say the least, but not beyond the realm of possibility. Raymond Chiao has been researching this exact idea for a decade or so I believe. Until some data goes along with these ideas, I'll do little more than be interested.
 
Cad

Cad

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How fast does a magnetic field propagate? Like if you flip on an electromagnet, does the field deploy itself at light speed or more than that?
 
iannis

iannis

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I don't think that's true about gravity acting at an infinite speed. If the force is pre-existing and constant, and if matter in conserved, then "the effect of gravity works at infinite speed" is a null statement. That seems on the order of a misconception. The only way you could test that is if you create matter out of the ether, so I'm not sure that it's even possible to prove that statement with observation of orbital mechanics. That sounds like a conceptual issue.

I'm not saying you're wrong. I'm not educated enough to know if you're correct or incorrect. But on the face of it that sounds like a misunderstanding or a mischaracterization. It's hard to believe that a construct like that would meet mathematical muster. I mean it's kinda sloppy.
 
T

Troll_sl

shitlord
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AFAIK gravity is constrained toc. However, gravity is also a constant force, and only its magnitude changes with distance (inverse square law... again, AFAIK, you're feeling the effects of the gravity of the black hole in the center of the Milky Way right now, but that effect approaches a Planck scale of irrelevant weakness), so its basically moot how fast it travels if its always active. We still need to understand how it works and propagates, however. Is it simply the curvature of spacetime? Purely geometric? If it is simply geometric, how does that geometry translate from the graininess of spacetime we see in QM? Or is there an underlying carrier force, as with electromagnetism, the weak and the strong forces? And if so, where is that carrier force hiding and can it be described in terms of QM?
 
Lejina

Lejina

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lanx_sl said:
For those that are curious, it doesn't mean i see shit like a dog "in grey" it just means that i can't really tell the difference between a red apple and a redder apple, shades are just nearly impossible to tell apart.
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Dogs don't see in grey. They are color blind, pretty much just like you really. Nearly all mammals have only two types of cones, due to our common ancestor being nocturnal shrews. Birds all have four because their dinosaur ancestors were daylight dwellers. Apes developed a mutation at some point granting them an extra cone type, making them outliers among mammals. btw, due to the location on the X chromosome, men are much more likely to be color blind due to a lack of redundancy and some rare women actually have 4 cone types.
 
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