Sentences with phrase «vacuum energy which»

When the idea was first proposed mathematically in 1994 it required a vast amount of negative vacuum energy which made the idea seem impossible.

Not exact matches

It is believed that vacuum fluctuations may have a connection with «dark energy» which drives the accelerated expansion of the universe.

They're called virtual particles, and the energy associated with the background hum of their constant appearance and disappearance became the way in which we understand the source of repulsive vacuum energy.

Strangely enough, the simplest example of energy with repulsive gravity involves Einstein's nemesis, quantum mechanics, which holds that even a perfect vacuum is not empty.

«We demonstrate that the simplest small mixing, related to the ratios of the scale at which electroweak physics operates, and a possible Grand Unified Scale, produces a possible contribution to the vacuum energy today of precisely the correct order of magnitude to account for the observed dark energy,» Krauss explained.

«We found that we could eliminate the need for operating at a partial vacuum, which should cut nearly all the losses of magnesium and significantly reduce the energy demands,» says Cameron.

[He's] absolutely right, of course, and we may be lucky, and I hope we are lucky; what Alan said is, I want to emphasize something about the negative features of what Alan said, [which] is that if the vacuum energy is dark energy, we won't be able to prove it is dark energy.

Dodelson: Again referring to this dark energy today, there are two possibilities that lead to optimistic branches and one is that dark energy today may not be vacuum energy, it may be something completely different; and a good piece of evidence for that is that inflation itself require [s] dark energy, so it kind of make sense to think, [«Well, we had some early [epoch] of dark energy which is something [we're trying to] figure out, maybe [today] there is also [a] new type of dark energy we are trying to figure out and it is not vacuum energy, so that would lead to a less pessimistic future.

The Big Bang, which released a tremendous amount of energy, may have left behind all manner of exotic entities of physics, such as cosmic strings, false vacuums, or negative matter or energy.

As Boyd recalls, he then remembered that Robert Millikan, a Nobel Prize - winning physicist and the head of Caltech from 1921 to 1945, also had to contend with removing copper oxide when he performed his famous 1916 experiment to measure Planck's constant, which is important for calculating the amount of energy a single particle of light, or photon, Boyd wondered if he, like Millikan, could devise a method for cleaning his copper while it was under vacuum conditions.

Quantum mechanics tells us that the vacuum of space - time is teeming with random quantum fluctuations, which create waves of energy.

But the authors note that the vacuum in which a black hole sits need not be devoid of particles — only energy — and therefore that soft particles are present there in a zero - energy state.

Guth hypothesized that the universe was initially trapped in a peculiar state (the «false vacuum») from which it decayed, in the process expanding exponentially and liberating the energy present in our universe today.

Within this spectrum [and this spectrum includes all known energy which can radiated thru the vacuum of space] is what is called the visible and infrared part of this spectrum.

And yes, a stationary molecule in a vacuum in deep space, with no interractions with other molecules which recieves little or no radiative energy, will aproximate to near absolute zero.

D Cotton June 15, 2013 at 6:38 am The whole of the pseudo physics of greenhouse effects and assumed heating of the surface by back radiation (or «radiative forcing») is trying to utilise the Stefan - Boltzmann equation which only relates to bodies in a vacuum losing all their energy by radiation without any conduction or evaporative cooling.

I'm guessing that Musk's Hyperloop will be different (I'm guessing Musk's thing will use tubes that have very low air pressure - too hard to get a complete vacuum, but the less air, the less friction - and use maglev - like ways to accelerate and decelerate, which means as a bonus that you can recover a lot of energy when you decelerate), but we'll see soon enough.

To find a position which will utilize my extensive knowledge of PVD, CVD, Ultra High Vacuum SEM and EDX to benefit a solar energy or semiconductor company.

Energy Star - qualified windows have an invisible glass coating, vacuum - sealed spaces filled with inert gas between panes, sturdier weather stripping than regular windows and improved framing materials — all of which reduce undesirable heat gain and loss in the home.