Modern and Theoretical Physics

Just read an article on nuclear fusion http://www.bbc.co.uk/news/blogs-china-blog-43792655 while eating my oatmeal porridge I drifted off with wild fantasies of imaginations, which needed some more knowledgeable people to ratify or ridicule. If leakage is a problem, why not just build it in space? Nature worked this out a long time ago! What about using the center of a gravitational well to mitigate the electromagnetic cost to confine the reaction. Is there a planet or moon with center that is plausibly cool and low enough pressure in which to build a reactor, but of sufficient mass to be significant in confining the plasma? Can also use the body mass itself a…

Stephen Hawking in applying qm to Singularities states that at the event horizon a particle and anti particle are condensed out of empty space by the energy near the event horizon. These particles are entangled then separated at the event horizon... This is covered in the article at this link: https://athensscienceobserver.com/2017/02/08/the-confusing-world-of-black-holes-and-quantum-mechanics/amp/ Isn't it much more likely that at the event horizon relative effects at c convert "things" into a relatively infinite energetic state(infinite frequency field?) as they pass and convert them back on the far side of the event horizon? My thought is perhaps th…

According to this link https://www.the-scientist.com/?articles.view/articleNo/48584/title/Newton-s-Color-Theory--ca--1665/, Newton's rainbow forms the familiar ROYGBIV because he thought the range of visible colors should be analogous to the seven-note musical scale. Can we reduce the sunlight to three main light as blue (or violet) light, green light and red light ? (The others are overlaid of this lights due to irregular light diffraction according to Young-Helmholtz Theory.)

The colored lights(led or similar things) irradiate a narrower range according to its own emission spectrum. In that case,whatever the color of light, why does the light appears white in the center of all of them ?

The daylight continuous broad spectrum percevies as a white color to eye. How the fluorescent light make the same effect due to have narrow and discontinuous emission bands

Hi Everyone, I want to know that which one these case is correct, Case 1 or Case 2. I mean, Is the visible spectrum as bright as on the right side or as dull as on left side in reality ? For example,the appearance of monochromatic yellow (570-590 nm) and cyan (475-495 nm) light looks like as Case 1 or Case 2. In other words, Is there any difference between monochromatic yellow-cyan lights and [yellow=green+red(500-730 nm)]-[cyan=blue+green(380-570 nm)] lights shown like on figure ?

How safe are fast reactors in comparison to common water-cooled? Why nobody (except Russia and India) want to build them? There seem to be huge amount of fuel for them which is essentially free - Plutonium, Uranium 232, Thorium and thousand of tons of dangerous nuclear waste. All this could be efficiently burned in fast reactors with few nuclear waste remaining. What about gas-cooled fast reactors in particular? Why these reactors are so unpopular?

They say an object has four dimensions x,y,z, and time, but if you stand far enough away from an object like say mars or another planet, its dimension of time or light isn't the same as its x,y,z, coordinates. Also say you were to find a church by its bells ringing. Wouldn't that create a 5th dimension of sound? or say a dog finds something by smell, 6? gravity waves? 7?

theoretically speaking, what would hold the two holes together? Surely a singularity is inappropriate here, right? I thought whiteholes came into theory to account for the balance and opposites/complementarity inherent in the rest of the nature universe. So imagination came up with something that looked like a light cone double vortex, wormhole hybrid passageway, with a hollow passageway. (look into the vortex- a ying yang!) I've read a spinning singularity could create a passage way. How? By just rotating on its axis? Wouldnt it need to spin so hard it rotated OFF its axis with the mass forming a orbit loop so there is space to pass through? …

Richard Terrile claims that smallest microscobic organisms are pixelated and that shows that the universe is a simulation. Is that an accurate claim?

If you consider that as a force gravity pulls in an infinite number of directions would it still be the weakest of forces if you applied the same terms to other forces?

Hello friends! I have a question about light. We all know that we see objects because they reflect light into our eyes. But we never see the actual light. So my question is why can't we see light. Or can we in fact see light. If so, how?

Hi, Could fourier transforms be used to analyze waves in a given area of space, and, given one is in an observable part of the universe, use the shift and amplitude to accurately ascertain location in all four dimensions? Demoguy

We use a stream of tiny magnets with differing masses?

Hi, I am confused about the electric field lines which are depicted mostly on the Internet as per conventional way. What I understand that the conventional current was due to positive charges which was wrong. Actual flow of the current was due to the negative charges or electrons. When the conductor is connected with both terminal of the battery Positive ( Where the concentration of the positive charges are more) and negative (Excess of electrons or negative charge) charges the electric field is generated. Electric field itself is the influence of charge around it. Since there is net positive charge on one electrode of the battery and net negative charge on th…

Does it start spinning? If so, will it spin for all eternity if he gets to disoriented to teleport back out? Or will the vacuum drain him of his magnetness, leaving him demagnetized with new identity issues, but curing his bipolar disorder? (Personification tickles me, I apologize to anyone less amused.) Seriously, what's going to happen to my friend?

I understand that in a normal conductor, the electron going in at one end of a wire will take a long time to get to the other end, and was wondering if the same thing applied to superconductors also, or do the cooper pairs pass more quickly or even at c ?...

To the best of my understanding, nuclear fission occurs when the nuclei of fissionable isotopes (such as thorium-232, U-235, plutonium-239, etc.) are bombarded by neutrons and split into either krypton & barium or antimony and niobium. My colloquial/superficial research also indicates that as far as nuclear fusion, the process transpires when the nuclei of deuterium and tritium collide/coalesce, creating helium and giving off energy. My question is this - if an antimatter device were to become practical, what would be its general mechanism theoretically? It seems to me that positrons would probably be involved seeing as how they are one of the more well-known subatomi…

Hi there to whomever may be reading this. I watch a lot of sci-show and a few Caltech lectures on YouTube and I am very fascinated with the universe and how it works as a whole. I am not in university nor do I have anything beyond a high school level of formal education so please forgive my lack of working knowledge on the mathematical aspect of physics and quantum theory. That being said, I have been meditating as of late and my brain started to wander over to the big picture of our universe and beyond. I found myself imagining what that would look like, and before long I was imagining all sorts of ways that could look. I once watched a lecture on black hole …

I watched a video that said that theoretically you could make Earth a black hole by adding Mass until it collapsed into a black hole. So? If you can add Mass thru acceleration how fast would something have to move before it collapsed into a black hole? I'm assuming it would be a proportional type process? Would there be a constant velocity that would apply? Assuming it is theoretically possible?

How time dilation is possible, when the light velocity (and/or its direction) is independent of its source? Just made a simple opengl/cpp visualization to figure this out. please correct me if I am wrong.

Magnetism is like a fan. if you put two fans facing each other then they would push away from each other. Same for two north ends of a magnet. All the electrons in a magnet spin in the same direction. This is what creates the fan. What it is churning isn't air. It's anyone's guess. Mine is that space contains an inactive energy that is only made active when acted upon. Energy is a squeezing on space essentially which resembles the squeezing of gravity and gives electrons weight. Either way the magnetic "field" as I'm sure you relativity people will be inclined to mention, is ewasily observable and requires nothing more then space to exist.

I was a bit surprised to come across what felt (perhaps naively) as QM terminology used in the same sentence ( and context?) as GR references in this recent post. (thread now closed). http://www.scienceforums.net/topic/112754-how-gravity-works/?do=findComment&comment=1033487 I know that Quantum Gravity is a work in progress (which I have no understanding of) and so I assumed that GR and QM were worlds apart in terms of compatibility. So apparently they do "talk to one another" in some areas.Are there any areas that would be of particular interest to a layman? Concepts perhaps that both theories agree on?

Let's say you have a slab of material of thickness (x) and one side is exposed to a temperature. I need an equation that represents what the temperature will be on the other side of the slab. I assume you need to take into account the material properties, such as optical thickness or opacity etc. I'm trying to understand how you represent the temperature on the others side of a material if one side is heated. Or lets say you have a pan made of material m and thickness x. If you heat the pan to 100degrees on the outside. What termperature will water in the pan feel?

Would it be possible to create a material that does not absorb energy from the environment? So it can store energy in it self but it will not get more energy "extra". Maybe it would pass energy through the material but the material would not get warmer. I was just wondering this, I find it interesting to think about it.