RainmanTime
Super Moderator
If anyone is "buying in" to the self-similarity between speed of sound and speed of light, and their relationships to their respective mediums of normal fluid, and superfluid, then perhaps we can transcend our light-based senses in an attempt to guess what characteristics of the superfluid mimic those of an ordinary fluid.
An interesting phenomenon develops when a body exceeds the speed of sound in some fluid, such as air. A shock wave is formed. That shock wave is an infinitesimally thin "event horizon" in the air. Across that "event horizon", the temperature, pressure, and density of air change drastically. In science, we call that a step-change, a discontinuity, a non-linear phenomenon. And there is another thing that a shock wave does to its surroundings: It distorts the light passing through it, just like light is distorted when it passes through water. The rapid change in density of air across the shock distorts the light enough to make the shock stand-out. This is how we visualize shock waves in supersonic wind tunnels, by taking advantage of the light distortion. This is called Schlierien photography.
So if the density of our normal fluid (air) is radically increased in the presence of a body traveling at supersonic speeds, and self-similarity applies, then what would happen to the superfluid in the presence of a body traveling at superluminal speeds? The density of the superfluid would also be drastically increased. That would be my guess. And since the shock wave density makes the otherwise invisible air visible (via Schlieren photography), then what would be the equivalent of a shock wave for a compressed region of superfluid?
My guess would be that this is what we perceive as MATTER. And Einstein did tell us that Matter is super-dense energy. Hmmm....are things fitting together here? Let's keep this analogy going. With a shock wave, we not only have a large change in density across the shock, but there is another parameter that changes drastically across the shock: Air pressure. For example, if we have standard sea-level pressure (29.92 inches of mercury) in front of a Mach 2 normal shock wave, gas dynamic relationships will tell us that the pressure behind that shock wave will be quite a bit greater...as in 134.64 inches of mercury. That is 4.5 times atmospheric pressure!!! That is precisely why the forces of drag are so large on a supersonic jet fighter, because the pressure increase is enormous as compared to subsonic flight.
And now the superfluid situation with light. Do we know of a physical parameter dealing with matter and/or light that acts like a form of "pressure"? We certainly do! We call it GRAVITY! In the world of supersonic aerodynamics, "drag sucks"...and so does gravity in the world of superluminal superfluid dynamics!
Now isn't this interesting??? Does anyone wish to do some further conjecturing on this analogy? What might this tell us about how gravity could be manipulated?
Kind Regards,
RainmanTime
An interesting phenomenon develops when a body exceeds the speed of sound in some fluid, such as air. A shock wave is formed. That shock wave is an infinitesimally thin "event horizon" in the air. Across that "event horizon", the temperature, pressure, and density of air change drastically. In science, we call that a step-change, a discontinuity, a non-linear phenomenon. And there is another thing that a shock wave does to its surroundings: It distorts the light passing through it, just like light is distorted when it passes through water. The rapid change in density of air across the shock distorts the light enough to make the shock stand-out. This is how we visualize shock waves in supersonic wind tunnels, by taking advantage of the light distortion. This is called Schlierien photography.
So if the density of our normal fluid (air) is radically increased in the presence of a body traveling at supersonic speeds, and self-similarity applies, then what would happen to the superfluid in the presence of a body traveling at superluminal speeds? The density of the superfluid would also be drastically increased. That would be my guess. And since the shock wave density makes the otherwise invisible air visible (via Schlieren photography), then what would be the equivalent of a shock wave for a compressed region of superfluid?
My guess would be that this is what we perceive as MATTER. And Einstein did tell us that Matter is super-dense energy. Hmmm....are things fitting together here? Let's keep this analogy going. With a shock wave, we not only have a large change in density across the shock, but there is another parameter that changes drastically across the shock: Air pressure. For example, if we have standard sea-level pressure (29.92 inches of mercury) in front of a Mach 2 normal shock wave, gas dynamic relationships will tell us that the pressure behind that shock wave will be quite a bit greater...as in 134.64 inches of mercury. That is 4.5 times atmospheric pressure!!! That is precisely why the forces of drag are so large on a supersonic jet fighter, because the pressure increase is enormous as compared to subsonic flight.
And now the superfluid situation with light. Do we know of a physical parameter dealing with matter and/or light that acts like a form of "pressure"? We certainly do! We call it GRAVITY! In the world of supersonic aerodynamics, "drag sucks"...and so does gravity in the world of superluminal superfluid dynamics!
Now isn't this interesting??? Does anyone wish to do some further conjecturing on this analogy? What might this tell us about how gravity could be manipulated?
Kind Regards,
RainmanTime