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    Question about Gravity and curvature of space time

    Ah, too late for the party but it clicked with me like this (please someone point if it's wrong). Not only space is curved but time as well. And time does move forward. So if curved surface of Earth is space in one dimension and time in other, and we are standing still some distance away at...
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    Double slit in macroscopic world

    About lectures, I have seen them and read books and Feynman is just about the greatest character ever. I don't understand why he of all people thought us not to ask ourselves "But how it can be like that?" but just to "Shut up and calculate". He also seems to want us to stop trying to visualize...
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    Double slit in macroscopic world

    Thanks for quick reply. - My guesstimate was that it would show diffraction since two parts of droplet would interact with each other on way out. You mean it would not show diffraction pattern anyway? Wasn't one of the early attempts to explain diffraction a hypothesis that more than one...
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    Double slit in macroscopic world

    Well, classical waves just being waves don't have quanta so you can't see macroscopic duality. Yes, water droplets don't just fall apart, due surface tension. But neither do electrons or photons for some reason obviously. Point is, particle doesn't really have to fall apart to go trough...
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    Double slit in macroscopic world

    It doesn't have to be a superfluid or silicon oil. Let's suppose a water droplets are falling to a hidrophobic (wd40 sprayed LOL) surface with double slits. It seems probable to me that scenario will happen that droplet will split on surface, pass through both slits (in some random ratio) and...
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    Quantum phenomena as emergent property in networked computer simulation?

    I agree with notion that there should be no central, authoritative "right answer". Centralized servers are so 1990. :smile: Let's change "central server" to "peers". I find it more beautiful in design, and certainly feels more natural. Also, more secure and harder to turn off! :smile...
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    Quantum phenomena as emergent property in networked computer simulation?

    I'm not physicist, but a software developer. Please don’t hang up.:smile: I am building massive multiplayer online game server, and I started building it from scratch. I found that some programming issues emerged from it which had striking resemblance to quantum quirkiness, so I just wanted to...
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    Why photons don't fall to Earth?

    Hmm...I'm lost...didnt get the part. And I get different numbers. On Earth for anything to fall 1mm from being still you need a hundredth of a second. 1/1000 m = 10 m/s/s * (1/100 s)2 In a hundredth of second light would go through 3 million meters, which is 300000 reflections in our...
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    Why photons don't fall to Earth?

    Thanks all. So space-time here on Earth's surface is curved a lot, and things fall not due their mass but due space-time curvature (and of course their relative velocity). So it should still be possible then to trap light (for a few milliseconds at least) so it does not escape but to show some...
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    Why photons don't fall to Earth?

    Thanks DrDu. So 3000km is a problem for light? I mean it would only take a millisecond, but I guess it can't really "survive" let's say 3 million reflections in mirrors 1m apart? (or 30 million for 10cm apart) without getting absorbed. But light was successfully slowed down to 10km/s, which is...
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    Why photons don't fall to Earth?

    So light gets bent but it does not fall? Does it just get absorbed before? Single photon can't be trapped long enough? Thanks!
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    Why photons don't fall to Earth?

    @phyzguy: well of course because it is moving at very specific constant speed and trajectory. But it would fall if we slowed it down, right? Or keep the speed, but we made it bounce back and forth between some huge walls or force it to some other travelling path e.g. arctic circle at same...
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    Why photons don't fall to Earth?

    Some introductory line about me apologizing for my ignorance and inability to find answers on interwebs. :smile: If photons get affected by gravitational field (or follow the curvature of space-time created by nearby massive objects) and have in essence some non-rest mass how come they...
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    Speed of Gravity

    Thanks for the reply, It actually did enlighten me somewhat. But kind of hard to swallow. If sun does not move linearly and constantly what then? Do we receive information (instantly via gravity wave) from sun about it's whereabouts in 8 minutes? I believe that any theory can be made to work...
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    Speed of Gravity

    Wait, you are worried about effects being instantaneous after you instantaneously dropped the whole sun? I don't like logical reasoning from impossible scenarios. :) Can anyone confirm Gara, point to some references about gravity feeling instant. Do planets and galaxies spin as they should with...
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    Gravity and Atraction.

    Well yes, I was in fact just offering a differnet point of view, with fictional centrifugal force. True about elliptical orbits also. There is no eqilibrium there and kinetic energy does change. Never really tought about it that way, thanks.
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    What are the biggest problems of push / kinetic gravity theory?

    Which would take the most imagination to explain, avoid and resolve and make theory work, I guess. We can't really prove any theroy impossible, just extremely unlikely and unbelievable, right? Or just don't order them then. :) I will surely look into all of them anyway. Thanks for your time.
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    What are the biggest problems of push / kinetic gravity theory?

    What are the biggest problems of "push" / kinetic gravity theory? Please, don't crucify me! I saw a couple of threads here closed for bringing this up, which I don't really understand why. Shouldn't we always doubt? I understand that it is old and common and amateurish idea in physics, but that...
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    Gravity and Atraction.

    I like to think of it just as equilibrium of gravitational and centrifugal force. Down to earth example, spinning the stone on the end of a rope. Rope tension being the gravity. Things would make much more sense if there were rope tied to the Moon! I hate gravity. :)
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    Is there something that Sun actually absorbs?

    Thanks Vanadium, I'll need some time to chew on it. Did find this on Wikipedia on muons, same detector: http://en.wikipedia.org/wiki/File:Moons_shodow_in_muons.gif . No sun there though. Any muons coming from "below" the Earth you think? I should think yes, since they go through Sun. Or they are...
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    Is there something that Sun actually absorbs?

    I wish I had energy/wavelength line chart measurements with values plotted for directions from: couple of random 'black' point in space, Sun, Moon, Earth (downwards), and couple of stars. Wavelengths to go from electron size to star size. Is that a lot to ask? ;-) Anyway, I would really be...
  22. L

    What can be detected in chunk of vacuum?

    Wow. I would imagine that is some pressure, holding the star from collapsing! Is it because of intensity (quantity) of light or it's high frequency (energy). Or both probably?
  23. L

    Is there something that Sun actually absorbs?

    Thanks all for ther input. I liked "opposite of what astronomers typically look for" part, it's usualy worth to look the opossite way (ask Rutherford :). I feel there might be something to learn from Sun's absorbing powers, while ignoring it's emission, rather than always making sure that Sun is...
  24. L

    What can be detected in chunk of vacuum?

    I am more interested in EMs (and effects of it) that comes outside solar system (perhaps maybe even get absorbed by sun). Are they accounted for? I'm not sure I follow you on star pressure thingie. You are saying there is "light" inside stars pushing matter outwards reducing total inside...
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    What can be detected in chunk of vacuum?

    Thanks James. Do you in "pressure of light" include all EM radiation beside visible and all other fast traveling particles? And is that amount empirical or calculated? Interiors of stars would have high pressures, but from gravity in the first place, correct?
  26. L

    Is there something that Sun actually absorbs?

    I would think so also. As shiny and radiating our Sun is, it is still a great amount of mass that really shield us from every imaginable radiation comming from deep space, from that direction that is. I would just like to know what kind of radiation it might be. Is there any radiation like...
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    What can be detected in chunk of vacuum?

    I guess you are right about amount of photons really comming through, it is big but not that big. Just found out that recent images from Hubble were "capturing" in literally days of exposure, "Almost single photon at the time". And you would be right about kinetic energy effect being small too...
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    Is there something that Sun actually absorbs?

    Thanks to both of you. So in fact there is more high energy protons comming from everywhere else than from the direction of sun? 1] I am not going after sunspots as in spots on the sun..i think! :) 2] I do understand that I think. My question would be about higher energy levels (in some...
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    What can be detected in chunk of vacuum?

    First, thanks for you answers. I was kinda aiming at the quantity of different radiation and information that actually goes through every bit of space at any moment. Is it reasonable to say that just by "capturing" all events in realy really small piece of space and in small timeframe one can...
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    Is there something that Sun actually absorbs?

    So is there? :) ... Is there anything (radiation waves, particles, what not...) That Sun absorbs more than it emits? I guess it absorbs visible light of stars behind it, but it emits a ton of more. But is that the case with all EM frequencies? What about gamma rays or any other background...
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